JP2001100924A - System and method of recording and reproducing information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a recording operation with a possibility that a buffer underrun occurs in the middle of the recording of information to a recording medium. SOLUTION: A host computer 2 transfers test data to an optical disk drive 1 before transferring data to be recorded to an optical disk 2, and increases the execution priority of a task transferring the mentioned data when informed by the optical disk drive 1 that the recording can not be performed. The optical disk drive 1, on the other hand, receives the test data transferred from the host computer 3, measures the speed of the information transfer from the host computer 2 according to the test data, and compares the information transfer speed with the speed of information recording to the optical disk 20, thereby informing the host computer 2 that the recording is impossible when judging that the information transfer speed is not faster than the information recording speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording and reproducing apparatus such as an optical disk drive for recording and reproducing information on and from a recording medium such as an optical disk, and a host computer for transferring information to the information recording and reproducing apparatus. The present invention relates to an information recording / reproducing system including an information processing device.

[0002]

2. Description of the Related Art Generally, optical disks such as DVDs and CDs are known as recording media for optically recording and reproducing information. Among them, DVD-recordable only once
Optical disks called R and CD-R are known.

[0003] These optical discs are very inexpensive compared to optical discs that can record and reproduce information many times, but can be recorded only once. Therefore, if recording fails during recording, the optical disc itself becomes defective. There is a disadvantage that it cannot be used. For this reason, there is a need for a technique that does not stop recording as much as possible during recording.

On the other hand, there is an optical disc drive as an information recording / reproducing apparatus for optically recording and reproducing information on and from the above-mentioned optical disc. The optical disk drive is usually connected to a host computer as an information processing device through an interface for peripheral devices represented by SCSI and ATAPI.

In general, when data is recorded on a recording medium such as an optical disk, recording data is prepared in advance on a host computer, and the data is transferred to the optical disk drive through an interface such as SCSI or ATAPI. And recording the received data on an optical disk inserted in its own drive.

However, there is a difference between an information transfer speed at which data is transferred from the host computer to the optical disk drive and an information recording speed at which data is recorded on the optical disk. Data received by the optical disk drive is transferred to the optical disk at the same information transfer speed. It cannot be recorded.

Therefore, a buffer memory for data is provided in the optical disk drive, the data transferred from the host computer is temporarily stored in the buffer memory, the data is taken out from the buffer memory in accordance with the recording speed on the optical disk, and the data is transferred to the optical disk. The method of recording is taken.

In such a system, when the information transfer speed from the host computer is higher than the information recording speed on the optical disk, the buffer memory can absorb the speed difference between the two, so that recording on the optical disk is possible. Becomes

In other words, in this case, since the information transfer speed from the host computer is higher, the amount of data stored in the buffer memory increases with time. By temporarily stopping the data transfer and restarting the data transfer when the free space on the buffer memory becomes equal to or more than a certain amount, recording on the optical disk can be realized without overflowing the buffer memory.

Normally, there is no problem because the information transfer speed of data from the host computer is higher than the recording speed on the optical disk, but the information transfer speed may be lower than the information recording speed for some reason. However, in this case, there is a problem in recording on the optical disk.

For example, a host computer is often connected to peripheral devices other than the optical disk drive, for example, a hard disk device. In many cases, these peripheral devices use the same interface as the optical disk drive. Can be

When the optical disk drive and the hard disk drive are connected by the same interface bus, the bus is shared when both devices are operated at the same time. Slower than when running on

In many cases, a host computer employs a multitasking OS, and a plurality of processes (tasks) are generally operating at the same time. For this reason, it is conceivable that the information transfer speed to the optical disk drive varies depending on the number of other operating tasks and the magnitude of the load.

[0014] For these reasons, the information transfer speed of data with the host computer may be lower than the information recording speed. In this case, the amount of data stored in the buffer memory decreases with time, and the amount of data stored on the optical disk is reduced. Data to be recorded may not be stored in the buffer memory. This is called a buffer underrun, and the recording on the optical disk is temporarily stopped.

Normally, when recording on an optical disk, recording is performed in block units of a certain size.
In an optical disc that can record only once, such as VD-R, the area that has been recorded cannot be erased, so the block that was recorded when a buffer underrun occurred becomes an invalid area. .

That is, when a buffer underrun occurs, the data to be recorded is not stored in the buffer memory, so the recording on the optical disk is stopped halfway, and the block being recorded becomes an incomplete data block and cannot be used. .

If such an invalid area exists on the optical disc, a process of reproducing the data by skipping the area at the time of reproduction is required, which may cause a decrease in reproduction speed or a malfunction.

Therefore, when recording on an optical disk on which recording can be performed only once, it is very important to enable recording without causing buffer underrun in the middle.

As one of the recording methods, there is a method called Disc At Once, in which all data is recorded on an optical disk at one time. In the case of recording by this method, the recording cannot be stopped in the middle, so that if the buffer underrun occurs, the optical disk cannot be used.

Conventionally, in order to solve the above-described problem, an information transfer speed is measured when data transfer is started, and the information transfer speed is compared with the information recording speed. Recording on an optical disk is started only when the value is high (for example, see Japanese Patent Application Laid-Open No. 10-188).
443) has been proposed.

[0021]

However, in the above-described conventional method, it is impossible to determine whether the information transfer speed is sufficient unless the data transfer is started. There has been a problem that it is not possible to cope with increasing the information transfer speed by performing the processing, and it becomes impossible to continue the recording when a buffer underrun occurs during the recording of the information.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to prevent a recording operation in which a buffer underrun may occur during the recording of information on a recording medium.

[0023]

According to the present invention, there is provided an information recording / reproducing apparatus for recording and reproducing information on and from a recording medium, and information for transferring the information to the information recording / reproducing apparatus. In the information recording / reproducing system comprising a processing device, a test information transfer unit for transferring test information to the information recording / reproducing device before transferring the information to the information processing device; and a notification that recording is disabled from the information recording / reproducing device. When receiving the information, providing a transfer processing priority execution means for raising the execution priority of the processing for transferring the information, the information recording and reproducing apparatus, test information receiving means for receiving the test information transferred from the information processing apparatus, Information transfer rate measuring means for measuring the information transfer rate from the information processing device based on the test information received by the means,
Means for comparing the information transfer speed measured by the means and the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed,
If the means determines that the information transfer speed is not higher than the information recording speed, a recording disable notification means is provided for notifying the information processing apparatus of a recording disable.

Further, in the information recording / reproducing system comprising an information recording / reproducing apparatus for recording and reproducing information on and from a recording medium and an information processing apparatus for transferring the information to the information recording / reproducing apparatus, Test information transfer means for transferring test information to the information recording / reproducing device before transferring the information; and execution priority of a process for transferring the information when receiving a record disable notification from the information recording / reproducing device. The test information is re-transferred to the information recording / reproducing device, and the execution priority of the re-transfer process and the process of transferring the information is further advanced until the information recording / reproducing device does not receive a notification indicating that recording is not possible. Means for repeating processing, test information receiving means for receiving the test information transferred from the information processing apparatus, An information transfer rate measuring means for measuring an information transfer rate from the information processing apparatus based on the test information received by the means, and comparing the information transfer rate measured by the means with the information recording speed on the recording medium, Means for determining whether or not the information transfer speed is higher than the information recording speed; and, when the means determines that the information transfer speed is not higher than the information recording speed, a message indicating that the information cannot be recorded on the information processing apparatus. It is preferable to provide a means for notifying and repeating the comparison and determination and the notification process until it is determined that the information transfer speed is higher than the information recording speed.

Further, in the information recording / reproducing system comprising an information recording / reproducing apparatus for recording and reproducing information on / from a recording medium and an information processing apparatus for transferring the information to the information recording / reproducing apparatus, Test information transfer means for transferring test information to the information recording / reproducing apparatus before transferring the information; and other processing for transferring the information when receiving a recording disable notification from the information recording / reproducing apparatus. Means for lowering the execution priority of the information processing apparatus, the information recording / reproducing apparatus includes test information receiving means for receiving test information transferred from the information processing apparatus, and information processing apparatus based on the test information received by the means. Information transfer speed measuring means for measuring the information transfer speed from the information transfer speed measured by the information transfer speed and the recording medium Means for comparing the information recording speed to determine whether the information transfer speed is faster than the information recording speed, and when it is determined by the means that the information transfer speed is not faster than the information recording speed, It is preferable to provide a recording disable notification unit for notifying the information processing apparatus that the recording is disabled.

Also, in the information recording / reproducing system comprising an information recording / reproducing apparatus for recording and reproducing information on and from a recording medium and an information processing apparatus for transferring the information to the information recording / reproducing apparatus, Test information transfer means for transferring test information to the information recording / reproducing apparatus before transferring the information; and other processing for transferring the information when receiving a recording disable notification from the information recording / reproducing apparatus. , The test information is re-transferred to the information recording / reproducing device, and the re-transfer process and other processes for the process of transferring the information are repeated until there is no notification of the recording failure from the information recording / reproducing device. Means for repeating processing for further lowering the execution priority of the processing is provided to the information recording / reproducing apparatus; Test information receiving means for receiving, information transfer rate measuring means for measuring an information transfer rate from the information processing apparatus based on the test information received by the means, information transfer rate measured by the means, and the recording medium Means for comparing whether or not the information transfer speed is higher than the information recording speed by comparing the information transfer speed with the information transfer speed, and when the information transfer speed is determined not to be higher than the information record speed by the means. Means may be provided for notifying the information processing apparatus that recording is impossible, and repeating the comparison and determination and the notification processing until it is determined that the information transfer speed is higher than the information recording speed.

Further, in an information recording / reproducing system comprising an information recording / reproducing apparatus for recording and reproducing information on / from a recording medium and an information processing apparatus for transferring the information to the information recording / reproducing apparatus, Test information transfer means for transferring test information to the information recording / reproducing device before transferring the information, and a process other than the process for transferring the information when receiving a recording disable notification from the information recording / reproducing device. Means for stopping the operation of processing, test information receiving means for receiving test information transferred from the information processing apparatus, information processing apparatus based on the test information received by the means, Information transfer speed measuring means for measuring the information transfer speed from the computer, the information transfer speed measured by the means, and the information recording speed for the recording medium Means for determining whether or not the information transfer speed to be compared is higher than the information recording speed; and, when the means determines that the information transfer speed is not higher than the information recording speed, It is preferable to provide a recording-disabled notifying unit for notifying that recording is disabled.

Also, in the information recording / reproducing system comprising an information recording / reproducing apparatus for recording and reproducing information on and from a recording medium and an information processing apparatus for transferring the information to the information recording / reproducing apparatus, Test information transfer means for transferring test information to the information recording / reproducing device before transferring the information, and a process other than the process for transferring the information when receiving a recording disable notification from the information recording / reproducing device. Stop the operation of the process, re-transfer the test information to the information recording / reproducing device, and further perform the re-transfer process and the process of transferring the information until there is no notification of the recording failure from the information recording / reproducing device. Means for repeating a process of stopping the operation of another process is provided, and the information recording / reproducing device is provided with a test information receiver for receiving test information transferred from the information processing device. And an information transfer rate measuring means for measuring an information transfer rate from the information processing apparatus based on the test information received by the means, and comparing the information transfer rate measured by the means with the information recording speed on the recording medium. Means for determining whether or not the information transfer speed is higher than the information recording speed; and when the means determines that the information transfer speed is not higher than the information recording speed, Notify that recording is not possible,
It is preferable to provide a means for repeating the comparison and determination and the notification process until it is determined that the information transfer speed is higher than the information recording speed.

Further, in the information recording / reproducing system as described above, it is preferable that the information processing apparatus is provided with means for stopping the processing in order from the processing having the highest execution priority when the processing is stopped.

In the information recording / reproducing system as described above, the information processing apparatus has a higher execution priority than the processing for transferring the information when the processing is stopped, and the processing occupancy rate during the arithmetic processing. It is preferable to provide means for stopping the processing in order from the highest processing.

Further, in the information recording / reproducing system comprising an information recording / reproducing apparatus for recording and reproducing information on / from a recording medium and an information processing apparatus for transferring the information to the information recording / reproducing apparatus, Test information transfer means for transferring test information to the information recording / reproducing device before transferring the information; and recording-disabled notification output means for outputting a notification of recording failure from the information recording / reproducing device when the notification is received from the information recording / reproducing device. A test information receiving means for receiving the test information transferred from the information processing apparatus, and measuring an information transfer speed from the information processing apparatus based on the test information received by the information recording / reproducing apparatus. An information transfer speed measuring means for comparing the information transfer speed measured by the information transfer speed with the information recording speed on the recording medium, Means for determining whether or not the feeding speed is higher than the information recording speed, and, when the means determines that the information transfer speed is not higher than the information recording speed, notifies the information processing apparatus of the recording failure. It is preferable to provide a recording-disabled notifying means for performing the recording.

Also, in the information recording / reproducing system comprising an information recording / reproducing apparatus for recording and reproducing information on and from a recording medium, and an information processing apparatus for transferring the information to the information recording / reproducing apparatus, Test information transfer means for transferring test information to the information recording / reproducing device before transferring the information; and when receiving a notification indicating that recording is not possible from the information recording / reproducing device, outputting the notification to output the information recording / reproducing device. A required information transfer speed is obtained based on the information recording speed from the device, and a required information transfer speed output means for outputting the information transfer speed is provided. Test information receiving means for receiving information, and information transfer for measuring an information transfer speed from the information processing apparatus based on the test information received by the means. Degree measuring means, means for comparing the information transfer speed measured by the means with the information recording speed on the recording medium to determine whether the information transfer speed is higher than the information recording speed, and the means When it is determined that the information transfer speed is not faster than the information recording speed, it is preferable to provide a recording disable notification unit for notifying the information processing device that the information cannot be recorded.

Further, in the information recording / reproducing system comprising an information recording / reproducing apparatus for recording and reproducing information on / from a recording medium and an information processing apparatus for transferring the information to the information recording / reproducing apparatus, The test information transfer means for transferring test information to the information recording / reproducing device before the transfer of the information, and stops the operation of the process for transferring the information when receiving a recording disable notification from the information recording / reproducing device. Test information receiving means for receiving the test information transferred from the information processing apparatus, and providing the information recording / reproducing apparatus with information from the information processing apparatus based on the test information received by the means. An information transfer speed measuring means for measuring an information transfer speed, and an information transfer speed measured by the information transfer speed and an information recording speed for the recording medium. Means for determining whether the information transfer speed is higher than the information recording speed by comparing the information transfer speed with the information processing device when the information transfer speed is determined to be not higher than the information recording speed by the means. It is preferable to provide a recording-disabled notifying unit for notifying that recording is disabled.

In the information recording / reproducing method in which the information recording / reproducing apparatus records and reproduces the information transferred from the information processing apparatus on a recording medium, the information processing apparatus transmits the information before transmitting the information. The test information is transferred to the recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and increases an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster, the information processing device is notified that recording is not possible, and the information processing device is notified of the recording prohibition from the information recording / reproducing device. Also it provides a method of advancing the execution priority of the process of transferring the information.

Further, in the information recording / reproducing method in which the information recording / reproducing apparatus records and reproduces the information transferred from the information processing apparatus to / from a recording medium, the information processing apparatus includes the step of transmitting the information before transmitting the information. The test information is transferred to the recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and increases an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, the information processing device is notified of the recording prohibition, and the information processing device receives the recording prohibition notification from the information recording / reproducing device. In this case, the execution priority of the process of transferring the information is increased, and the test information is re-transferred to the information recording / reproducing device. The re-transfer process and the process of transferring the information are repeated to further raise the execution priority, and the information recording / reproducing apparatus performs the comparison and the above until the information transfer speed is determined to be higher than the information recording speed. The determination and the above notification process may be repeated.

In the information recording / reproducing method in which the information recording / reproducing apparatus records and reproduces the information transferred from the information processing apparatus on a recording medium, the information processing apparatus may execute the information transfer before transmitting the information. The test information is transferred to the recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and increases an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster, the information processing device is notified that recording is not possible, and the information processing device is notified of the recording prohibition from the information recording / reproducing device. , It may move down the execution priority of other processes for the process of transferring the information.

Further, in the information recording / reproducing method in which the information recording / reproducing apparatus records and reproduces the information transferred from the information processing apparatus on a recording medium, the information processing apparatus includes a step of transmitting the information before transmitting the information. The test information is transferred to the recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and increases an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, the information processing device is notified of the recording prohibition, and the information processing device receives the recording prohibition notification from the information recording / reproducing device. In this case, the execution priority of another process with respect to the process of transferring the information is reduced, and the test information is re-transferred to the information recording / reproducing device. The information transfer speed is faster than the information recording speed, and the information transfer speed is higher than the information recording speed. It is preferable to repeat the above-described comparison and determination and the above-mentioned notification processing until it is determined that the above-mentioned condition is satisfied.

[0038] In the information recording / reproducing method in which the information recording / reproducing apparatus records and reproduces the information transferred from the information processing apparatus on a recording medium, the information processing apparatus may transmit the information before transmitting the information. The test information is transferred to the recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and increases an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster, the information processing device is notified that recording is not possible, and the information processing device is notified of the recording prohibition from the information recording / reproducing device. , It is preferable to stop the operation of the other processing other than the processing of transferring the information.

Further, in the information recording / reproducing method in which the information recording / reproducing apparatus records and reproduces the information transferred from the information processing apparatus on a recording medium, the information processing apparatus may execute the information transfer before transmitting the information. The test information is transferred to the recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and increases an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, the information processing device is notified of the recording prohibition, and the information processing device receives the recording prohibition notification from the information recording / reproducing device. Stop the operation of the other processes other than the process of transferring the information, re-transfer the test information to the information recording / reproducing device, and the information processing device disables recording from the information recording / reproducing device. The information transfer speed is higher than the information recording speed, and the information transfer speed is higher than the information recording speed. It is preferable to repeat the above-described comparison and determination and the above-mentioned notification processing until it is determined that the above-mentioned condition is satisfied.

In the information recording / reproducing method as described above, it is preferable that the information processing apparatus stops the processes in descending order of execution priority when the processes are stopped.

Further, in the information recording / reproducing method as described above, the information processing apparatus has a higher execution priority than the processing for transferring the information when the processing is stopped, and the processing occupancy rate in the arithmetic processing. It is preferable to stop the processing in order from the highest processing.

Also, in the information recording / reproducing method in which the information recording / reproducing apparatus records and reproduces the information transferred from the information processing apparatus on a recording medium, the information processing apparatus performs the information transfer before transmitting the information. The test information is transferred to the recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and increases an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster, the information processing device is notified that recording is not possible, and the information processing device is notified of the recording prohibition from the information recording / reproducing device. , May output the notification.

Further, in the information recording / reproducing method in which the information recording / reproducing apparatus records and reproduces the information transferred from the information processing apparatus on the recording medium, the information processing apparatus may execute the information transmitting before transmitting the information. The test information is transferred to the recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and increases an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, the information processing device is notified of the recording prohibition, and the information processing device receives the recording prohibition notification from the information recording / reproducing device. Come, may the notification output to the seek necessary information transfer rate on the basis of the information recording speed from the information recording and reproducing apparatus, and outputs the information transfer rate.

Further, in the information recording / reproducing method in which the information recording / reproducing apparatus records and reproduces the information transferred from the information processing apparatus on a recording medium, the information processing apparatus may perform the above-mentioned information transfer before transmitting the information. The test information is transferred to the information recording / reproducing device, the information recording / reproducing device receives the test information transferred from the information processing device, and the information transfer speed from the information processing device is determined based on the received test information. Is measured, and the measured information transfer speed is compared with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed. When it is determined that the recording is not faster than that, the information processing device is notified of the recording prohibition, and the information processing device receives the recording prohibition notification from the information recording / reproducing device. Can, it is preferable to stop the operation of the process of transferring the information.

The information recording / reproducing system according to the first aspect of the present invention and the information recording / reproducing method according to the twelfth aspect transfer test information from an information processing apparatus to an information recording / reproducing apparatus before recording information. The information transfer speed is measured. If the measured information transfer speed is lower than the information recording speed on the recording medium, the information processing device notifies the information processing device that recording on the recording medium cannot be performed, and the information processing device notifies the recording prohibition. When it is received, the execution priority of the process for transferring the information is raised higher than the other processes, so it is necessary to make sure in advance that the recording operation in the information recording / reproducing device cannot be performed due to insufficient information transfer speed from the information processing device. After confirming, the information processing apparatus side can secure a sufficient information transfer rate in advance, and the information recording / reproducing apparatus can record the information without stopping other processes operating on the information processing apparatus. Operate can reliably be performed without causing a buffer underrun.

According to the information recording / reproducing system of the present invention, the test information is transferred from the information processing apparatus to the information recording / reproducing apparatus before recording the information. The information transfer speed is measured. If the measured information transfer speed is lower than the information recording speed on the recording medium, the information processing device notifies the information processing device that recording on the recording medium cannot be performed, and the information processing device notifies the recording prohibition. When received, after increasing the execution priority of the process of transferring information over other processes, the test information is transferred again, and the information is reproduced until the information transfer speed becomes higher than the information recording speed in the information recording / reproducing apparatus. Since the execution priority of the transfer process of the information recording / reproducing device is sequentially increased, it is confirmed in advance that the recording operation of the information recording / reproducing apparatus cannot be performed because the information transfer speed is not sufficient. Side can secure a sufficient information transfer rate in advance, without stopping other processes operating on the information processing apparatus, and further, by minimizing the change of the execution priority of the processes, The recording operation by the recording / reproducing apparatus can be reliably performed without causing a buffer underrun.

The information recording / reproducing system according to the third aspect of the present invention and the information recording / reproducing method according to the fourteenth aspect transfer test information from an information processing apparatus to an information recording / reproducing apparatus before recording information. The information transfer speed is measured. If the measured information transfer speed is lower than the information recording speed on the recording medium, the information processing device notifies the information processing device that recording on the recording medium cannot be performed, and the information processing device notifies the recording prohibition. When it is received, the priority of execution of other processes other than the process of transferring information is lowered, so that it is not possible to perform the recording operation in the information recording / reproducing device in advance because the information transfer speed from the information processing device is not sufficient. After confirming, the information processing apparatus side can secure a sufficient information transfer rate in advance, and the information recording / reproducing apparatus can record the information without stopping other processes operating on the information processing apparatus. Operate can reliably be performed without causing a buffer underrun.

According to the information recording / reproducing system of the present invention, the test information is transferred from the information processing apparatus to the information recording / reproducing apparatus before recording the information. The information transfer rate is measured, and if the measured information transfer rate is lower than the information recording rate on the recording medium, the information processing apparatus is notified that recording on the recording medium is not possible, and the information processing apparatus is notified that recording is not possible. Then, after lowering the execution priority of the processing other than the processing of transferring the information, the test information is transferred again, and the other information is transferred until the information transfer speed becomes higher than the information recording speed in the information recording / reproducing apparatus. Since the processing execution priority is sequentially reduced, it is confirmed in advance that the recording operation in the information recording / reproducing device cannot be performed due to insufficient information transfer speed,
A sufficient information transfer speed can be secured in advance on the information processing device side, without stopping other processes running on the information processing device and minimizing the change in the execution priority of the process. Thus, the recording operation by the information recording / reproducing apparatus can be reliably performed without causing a buffer underrun.

According to the information recording / reproducing system of claim 5 and the information recording / reproducing method of claim 16, the test information is transferred from the information processing apparatus to the information recording / reproducing apparatus before recording the information. The information transfer speed is measured. If the measured information transfer speed is lower than the information recording speed on the recording medium, the information processing device notifies the information processing device that recording on the recording medium cannot be performed, and the information processing device notifies the recording prohibition. When it is received, the operation of other processes other than the process of transferring information is stopped, so confirm in advance that the recording operation in the information recording / reproducing device cannot be performed due to insufficient information transfer speed from the information processing device. However, a sufficient information transfer rate can be secured in advance on the information processing apparatus side, and the recording operation by the information recording / reproducing apparatus can be reliably performed without causing a buffer underrun.

According to the information recording / reproducing system of the present invention, the test information is transferred from the information processing apparatus to the information recording / reproducing apparatus before recording the information. The information transfer speed is measured. If the measured information transfer speed is lower than the information recording speed on the recording medium, the information processing device notifies the information processing device that recording on the recording medium cannot be performed, and the information processing device notifies the recording prohibition. Upon receipt, after stopping the operation of the other processing other than the processing of transferring the information, the test information is transferred again, and the other processing is performed until the information transfer speed becomes faster than the information recording speed in the information recording / reproducing apparatus. Operation is stopped in order, so check beforehand that the recording operation in the information recording / reproducing device cannot be performed because the information transfer speed is not enough. It is possible to minimize the processing to stop among the processings operating on the information processing apparatus, and to reliably perform the recording operation by the information recording / reproducing apparatus without causing a buffer underrun. it can.

According to the information recording / reproducing system of claim 7 and the information recording / reproducing method of claim 18, when stopping the processing during operation other than the information transfer processing, the processing is stopped from the processing with the highest execution priority. As a result, the processing in operation can be stopped efficiently.

According to the information recording / reproducing system of the present invention and the information recording / reproducing method of the present invention, when the processing other than the information transfer processing is stopped, the execution priority is higher than the information transfer processing. Are high, and the processing is stopped in order from the processing with the highest processing occupancy in the arithmetic processing by the CPU, so that the processing in operation can be stopped more efficiently.

In the information recording / reproducing system according to the ninth aspect of the present invention, the test information is transferred from the information processing apparatus to the information recording / reproducing apparatus before recording the information. The information transfer speed is measured. If the measured information transfer speed is lower than the information recording speed on the recording medium, the information processing device notifies the information processing device that recording on the recording medium cannot be performed, and the information processing device notifies the recording prohibition. When received, the notification is notified to the user by displaying, printing, etc., so that it is confirmed in advance that the recording operation in the information recording / reproducing device cannot be performed due to insufficient information transfer speed from the information processing device, It is possible for the information processing apparatus to leave to the user the work of securing a sufficient information transfer rate in advance (for example, to increase or decrease the execution priority of the processing or to select the processing to be stopped). That.

According to the information recording / reproducing system of the present invention, the test information is transferred from the information processing apparatus to the information recording / reproducing apparatus before recording the information. The information transfer speed is measured. If the measured information transfer speed is lower than the information recording speed on the recording medium, the information processing device notifies the information processing device that recording on the recording medium cannot be performed, and the information processing device notifies the recording prohibition. When it is received, the user is notified of the notification by output such as display or printing, and the information is transmitted to the user in the same manner by obtaining an information transfer speed higher than the information recording speed in the information recording / reproducing apparatus. In advance, it is confirmed that the recording operation in the information recording / reproducing apparatus cannot be performed because the information transfer speed from the information processing apparatus is not sufficient, and the information processing apparatus side performs sufficient information transfer in advance. Work to ensure degrees (e.g., selection of the processing to be rounded up or moved down or stop the execution priority of the process) can be left to the user.

According to the information recording / reproducing system of the present invention, the test information is transferred from the information processing apparatus to the information recording / reproducing apparatus before recording the information. The information transfer speed is measured. If the measured information transfer speed is lower than the information recording speed on the recording medium, the information processing device notifies the information processing device that recording on the recording medium cannot be performed, and the information processing device notifies the recording prohibition. When the information is received, the operation of the process for transferring the information is stopped, so that the recording operation in which the buffer underrun occurs can be avoided, and the recording medium can be prevented from being unusable.

[0056]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of an optical disc recording / reproducing system according to an embodiment of the present invention.

This optical disk recording / reproducing system has a CP
A control unit realized by a microcomputer including U, ROM, RAM, and the like; a display unit such as an LCD;
A host computer 2 having an interface 4 for connecting peripheral devices such as an optical disk drive 1 is provided. The host computer 2 is further connected to a hard disk 3 for storing data.

The interface 4 connects the host computer 2 and peripheral devices such as the optical disk drive 1 and includes, for example, SCSI, ATAPI, and IEEE.
1394 are well known. These devices communicate by using protocols defined by the respective interface specifications, and the host computer 2 and peripheral devices issue commands to operate the devices.

On the other hand, the CPU 10 of the optical disk drive 1
Is the host interface (I
/ F) 11, buffer manager 12, encoder / decoder 14, signal processing unit 16, optical pickup (PU)
Unit 17, disk drive unit 18, servo control unit 19
In addition to controlling the overall control including each block such as the above, it also executes processing for realizing various functions according to the present invention.

The host I / F 11 serves as an interface with the host computer 2 and includes a CD-RW, a DV
When information (user data) such as D is recorded on the optical disk 20, user data transmitted from the host computer 2 by the protocol of the interface 4 is transferred to the buffer manager 12, and when data is reproduced, the user data is transmitted from the buffer manager 12. SCSI user data
And sends it to the host computer 2 through an interface 4 such as ATAPI.

At the time of recording, the buffer manager 12 temporarily stores the user data sent from the host computer 2 in the buffer memory 13, and stores the user data in the buffer memory 13 in accordance with the information recording speed on the optical disc 20. Send to decoder 14.

The buffer manager 12 manages the amount of user data on the buffer memory 13, adjusts the amount of data so that recording on the optical disk 20 always continues, and runs out of user data on the buffer memory 13. If there is, user data transfer to the host computer 2 is requested. If user data is likely to overflow into the buffer memory 13, the user data transfer from the host computer 2 is temporarily stopped.

On the other hand, during reproduction, the encoder / decoder 1
4 temporarily stores the user data decoded in the buffer memory 13, and transmits the user data in the buffer memory 13 to the host computer 2 through the host I / F 11.

The buffer memory 13 is a data buffer for absorbing the difference between the information transfer speed of the user data and the information recording speed. The buffer memory 13 receives user data from the host I / F 11 during recording, and receives data from the encoder / decoder 14 during reproduction. This area is used to temporarily store data.

The transfer speed measuring section 15 measures an information transfer speed based on test information (test data) transferred between the host computer 2 and the optical disk drive 1, and is realized as follows, for example.

The transfer rate measuring section 15 has a timer for measuring time, and starts the timer when the transfer of test data starts. Next, the timer is stopped at the end of the transfer of the test data, and the time during this period is measured.

The amount of test data sent from the host computer 2 is counted. When the test data transfer starts, the value of the counter is set to "0", and every time test data transfer occurs, the counter value is counted by the size. The counter value is stopped when the test data transfer is completed, and the average information transfer speed is calculated by dividing the counter value by the information transfer time.

The encoder / decoder 14 decodes the digital signal sent from the signal processing section 16 at the time of reproducing data from the optical disk 20, and sends it to the buffer manager 12 as user data. On the other hand, when recording user data on the optical disc 20, the user data sent from the buffer manager 12 at an information transfer speed corresponding to the information recording speed is encoded into a data array to be recorded on the optical disc 20 and sent to the signal processing unit 16. send.

At the time of data reproduction, the signal processing section 16
Control data is sent to the servo control unit 19 to control the optical PU unit 17 and the disk drive unit 18 based on the reproduction signal and the error signal from the U unit 17 and the data based on the reproduction signal is encoded by the encoder / decoder 14.
To the decoder.

At the time of recording user data, the light P
The control data is sent to the servo control unit 19 to control the optical PU unit 17 and the disk drive unit 18 based on the reproduction signal, the synchronization signal, the error signal, and the like from the U unit 17 and the encoder / decoder 14 sends the control data to the servo control unit 19. The optical data is sent as data for recording
Transmit to unit 17.

The disk drive unit 18 includes a servo control unit 19
Based on the signal sent from the control of its own spindle motor to determine the rotation speed of the optical disk 20,
The spindle motor is rotated at the rotation speed.

The optical PU unit has a semiconductor element (laser diode: LD) as a light source, irradiates the optical disk 20 with a laser beam L, and reads data based on the reflectance of the return light. The read data is transferred to the signal processing unit as a reproduction signal.

At the time of recording user data, the optical disk 20 is irradiated with a laser beam with a laser power having a certain waveform pattern, and the data sent from the signal processing section 16 is written on the optical disk 20. . At the same time, the light P
Processing such as seek, tracking, and focusing for moving the U unit 17 and the light source is also performed.

The servo control unit 19 controls the optical PU unit 1 based on the control data calculated in the signal processing unit 16.
7 and the disk drive unit 18 are controlled. For example, light P
Position control of the U unit 17, power adjustment for laser light (LD light) irradiation by the light source on the optical PU unit 17,
Speed control by the spindle motor is performed.

That is, the optical disk drive 1 corresponds to an information recording / reproducing apparatus for recording and reproducing information on and from a recording medium, and the host computer 2 corresponds to an information processing apparatus for transferring information to the information recording / reproducing apparatus. .

The control unit and the interface of the host computer 2 transfer test information to the information recording / reproducing apparatus before transferring the information.
When receiving a notification that recording is not possible from the information recording / reproducing apparatus, the information recording / reproducing device performs a function of a transfer process priority executing unit that raises the execution priority of the process of transferring the information.

Further, the CP of the optical disk drive 1
U10, host I / F 11, transfer rate measuring unit 15, etc.
Test information receiving means for receiving test information transferred from the information processing apparatus, information transfer rate measuring means for measuring an information transfer rate from the information processing apparatus based on the test information received by the means, and the means Means for comparing the information transfer rate measured by the information transfer rate with the information recording rate on the recording medium to determine whether or not the information transfer rate is higher than the information recording rate; When it is determined that the recording speed is not higher than the recording speed, the information processing device functions as a recording-disabled notifying unit that notifies the information processing device that recording is disabled.

The control section and the interface of the host computer 2 transfer test information to the information recording / reproducing apparatus before transferring the information.
When receiving the notification of the recording disabled from the information recording and reproducing device, advance the execution priority of the process of transferring the information, re-transfer the test information to the information recording and reproducing device,
Until the information recording / reproducing device no longer receives a notification that recording is not possible, the information recording / reproducing device performs a function of repeating the retransfer process and the process of further increasing the execution priority of the information transfer process.

Further, the CP of the optical disk drive 1
U10, host I / F 11, transfer rate measuring unit 15, etc.
Test information receiving means for receiving test information transferred from the information processing apparatus, information transfer rate measuring means for measuring an information transfer rate from the information processing apparatus based on the test information received by the means, and the means Means for comparing the information transfer rate measured by the information transfer rate with the information recording rate on the recording medium to determine whether or not the information transfer rate is higher than the information recording rate; When it is determined that it is not faster than the recording speed, it notifies the information processing apparatus that recording is not possible, and performs the above-described comparison, determination, and notification processing until it is determined that the information transfer speed is faster than the information recording speed. Acts as a means of repeating.

The control section and the interface of the host computer 2 are provided with test information transfer means for transferring test information to the information recording / reproducing apparatus before transferring the information.
When receiving a recording disable notification from the information recording / reproducing apparatus, the information recording / reproducing device performs a function of lowering the execution priority of another process with respect to the process of transferring the information.

Further, a control unit and an interface of the host computer 2 are provided with test information transfer means for transferring test information to the information recording / reproducing device before transferring the information, and a recording disabled from the information recording / reproducing device. When the notification is received, the execution priority of another process with respect to the process of transferring the information is lowered, the test information is re-transferred to the information recording / reproducing device, and the information indicating that recording is disabled from the information recording / reproducing device is lost. The function of means for repeating the above-described retransfer process and the process of further lowering the execution priority of another process with respect to the process of transferring the information is performed.

A test information transfer means for transferring test information to the information recording / reproducing apparatus before transferring the information, comprising: a control unit and an interface of the host computer 2;
When a notification that recording is not possible is received from the information recording / reproducing apparatus, the information recording / reproducing device functions as a unit that stops the operation of other processing other than the information transfer processing.

Further, a control unit and an interface of the host computer 2 are provided with test information transfer means for transferring test information to the information recording / reproducing apparatus before transferring the information, and a recording disabled from the information recording / reproducing apparatus. When the notification is received, the operation of the other processes other than the process of transferring the information is stopped, the test information is re-transferred to the information recording / reproducing device, and the notification of the recording failure from the information recording / reproducing device disappears. Until the retransfer process and the process of transferring the information, a function of repeating the process of stopping the operation of another process is performed.

The control unit and the interface of the host computer 2 function as means for stopping the processing in order from the one with the highest execution priority when the processing is stopped.

Further, the control unit and the interface of the host computer 2 have a higher execution priority than the processing for transferring the information when the processing is stopped, and have the highest processing occupancy in the arithmetic processing. The function of means for stopping the processing in order is performed.

A control unit, an interface, a display unit, and the like of the host computer 2 transfer test information to the information recording / reproducing device before transferring the information. When receiving a recording-disabled notification, it functions as a recording-disabled notification output unit that outputs the notification.

Further, the control unit, the interface, the display unit, and the like of the host computer 2 transfer test information to the information recording / reproducing device before transferring the information. A required information transfer speed output means for outputting a notification to obtain a required information transfer speed based on the information recording speed from the information recording / reproducing device, and outputting the information transfer speed, when receiving a recording disable notification; Perform the function of

Further, a control unit and an interface of the host computer 2 are provided with test information transfer means for transferring test information to the information recording / reproducing device before transferring the information; The function of the transfer process stopping means stops the operation of the process of transferring the information when the notification of the above is received.

Next, the processing according to each claim of the present invention in the optical disk recording / reproducing system will be described.

(1) Processing according to claim 1 in this optical disk recording / reproducing system Next, FIG. 2 shows a flowchart of the operation of the system according to claim 1. FIG. 2 is a flowchart showing a process according to claim 1 of the present invention in the optical disc recording / reproducing system. FIG. 3 is a diagram showing a WRITE command configuration of a SCSI interface in the optical disk recording / reproducing system.

FIG. 4 is a flowchart showing a process of converting user data into recording data in the optical disk recording / reproducing system. FIG. 5 is an explanatory diagram of the task priority before the change of the host computer by the processing according to claim 1 of the present invention in the optical disk recording / reproducing system.

First, the host computer 2 attempts to transfer test data to the optical disk drive 1 in order to measure the information transfer speed on the interface 4.

As shown in FIG. 2, the host computer 2
The control unit prepares test data on the hard disk in the test data preparation process of step (indicated by “S” in the figure) 1.

The test data is actually stored on the optical disk 20.
, Any data may be used.
In order to more accurately measure the information transfer speed, a certain data size is required.

When the test data has been prepared, the control unit of the host computer 2 proceeds to step 2 and issues a test data transfer request to the optical disk drive.

For example, in the SCSI interface, a data transfer size can be designated by a write (WRITE) command as shown in FIG. The 0th byte is a command code, which indicates that this command is a write command. The first byte indicates the logical unit number of the device. In addition,
The address is represented by the third byte. The transfer data size is described in the fourth byte.

The host computer 2 and the optical disk drive 1 are connected to an interface 4 such as SCSI or ATAPI.
, The request is issued through the command for the interface.

In this case, a protocol is set in advance so that the application on the host computer 2 and the firmware of the optical disk drive 1 can understand each other's commands.

When the CPU 10 of the optical disk drive 1 receives the test data transfer request from the host computer 2 in step 11, the CPU 10 receives the test data of the designated transfer size from the host computer 2 through the interface 4. Is operated, a test data transfer request is issued to the host computer in step 12, the test data is received in step 13, and the process proceeds to step 14 to determine whether all test data has been received. Until it is determined that the test data has been received, the processing of sequentially receiving the test data by the processing of steps 12 and 13 is repeated.

On the other hand, the control unit of the host computer 2
When a test data transfer request from the optical disk drive is received in step 3, test data is transmitted in step 4, and the process proceeds to step 5 to determine whether all test data has been transmitted, and all test data has been transmitted. Steps 3 and 4 are repeated until it is determined that the test data has been transmitted, and test data is sequentially transmitted to the optical disk drive 1 in accordance with a request from the optical disk drive 1.

In the optical disk drive 1, during actual recording, the data received by the buffer manager 12 is stored in the buffer memory 13, but this test data is not recorded, so the buffer manager 12 discards the received test data as it is. .

When the CPU 10 determines that the transfer of all test data has been completed, the optical disk drive 1 proceeds to step 15 to obtain an information transfer speed based on the test data.

To determine the information transfer rate, for example, the following means is used. The CPU 10 starts the timer of the transfer rate measuring unit 15 when the transfer of the test data is started, stops the timer when the transfer of the test data is completed, measures the time during the transfer, and determines the time required for all the transfer. Measure the transferred time.

The size of the test data is measured by a counter that counts the amount of data. If a size is added to the data transfer request command sent from the host computer 2, it can be understood from this information.

Then, by dividing the size of the transferred test data by the transfer time, the average information transfer speed in the test data transfer can be measured.

Next, the CPU 10 compares the information transfer speed obtained by the above measurement with the information recording speed on the optical disk 20 in step 16, and determines whether or not the information transfer speed is higher than the information recording speed. .

The information recording speed on the optical disk 20 is determined by the speed of the disk. However, since the data sent as user data is recorded on the optical disc 20 after performing data processing as shown in FIG. 4, for example, it is evaluated by converting the user data size into the recording data size.

As shown in FIG. 4, in the data processing, first, the user data is divided into blocks of 2 KB, and sector information such as an address and an error detection code are added to each 2 KB block, and fixed data of fixed data is added. Scramble to prevent continuity.

Thereafter, the block is divided into a plurality, for example, 1
Combine 6 blocks into one big block, P
The data to which an error correction code called I or PO is added is divided into 16 parts, a sector synchronization signal is added thereto, and the data is converted into a data string to be recorded on the optical disk 20 by 8-16 modulation.

Since the user data is converted into a recordable data sequence on the optical disk 20 and recorded, the size of the user data is different from the actual recording size. Evaluate speed.

When the information transfer speed exceeds the information recording speed of the optical disk 20, that is, when the information transfer speed is determined to be higher than the information recording speed in the determination in step 16, the CPU 10 of the optical disk drive 1 actually stores the data. Since there is no problem in recording, the process proceeds to step 18 to notify the host computer via the interface that recording on the optical disk is possible.

The control section of the host computer 2 receives a recordable notification from the optical disk drive in step 6 and determines whether or not recording is possible based on the notification in step 7. It is determined that recording on the optical disc is possible at the transfer speed, and the process is terminated.

Thereafter, in response to a recording request to the optical disk 20, data is transferred to the optical disk drive at the current information transfer speed, and the optical disk drive records the transferred data.

On the other hand, when the information transfer speed is lower than the information recording speed of the optical disc 20,
If it is determined in step 16 that the information transfer speed is not faster (slower) than the information recording speed, there is a great possibility that a buffer underrun will occur during normal data recording. Notify that recording is not possible.

The control unit of the host computer 2 receives from the optical disk drive at step 6 a notification indicating that recording is not possible, and determines at step 7 whether or not recording is possible based on the notification. It is determined that it is impossible to record data on the optical disk if the transfer speed remains unchanged, and the process proceeds to step 8 to increase the interface priority in the host computer to increase the task priority. That is, the execution priority of the process of transferring information is increased.

Thereafter, in response to a recording request to the optical disk 20, data transfer to the optical disk drive is performed at an information transfer speed higher than the information recording speed by raising the execution priority, and the optical disk drive transmits the transferred data. Make a record.

The host computer 2 executes the multitask O
In many cases, S is employed, and a plurality of tasks (processes) are operating at the same time. The priorities are set for these tasks, and the tasks with higher execution priorities are given the resources of the CPU 10 preferentially. As a result, the execution speed of the tasks is increased.

The execution priority may be automatically determined by the control unit of the host computer 2 or may be changed by the user operating the host computer 2 issuing a command.

Therefore, the host computer 2 can increase the information transfer speed by increasing the execution priority of the process related to the information transfer speed of the interface 4 with the optical disk drive 1.

For example, when the task A for performing data transfer and the task B for greatly consuming the processing occupancy of the control unit are operating simultaneously on the host computer 2, the task A
If the execution priority of the task A is lower than that of the task B, the CPU resources allocated to the task A decrease, and the information transfer speed through the interface 4 decreases.

Therefore, the control unit of the host computer 2 may stop the task B in order to allocate more CPU resources to the task A. However, in the case of a program in which the task B operates for a very long time, such as a simulation program, if the operation of the task B is stopped halfway, the program must be started again, and the processing time up to that point Is wasted.

Therefore, it is necessary to allocate more CPU resources to task A without interrupting the operation of task B. As a solution to this, there is a method of changing the task execution priority.

For example, as shown in FIG. 5, consider a model in which a plurality of tasks are operating on the host computer 2 at the same time. In the figure, task D has a level “-5” priority (execution priority), tasks B and C have a level “2” priority, respectively, and task A
Is the priority of the level “5”, and the task E is operating at the priority of the level “10”.

As for the priority level, the smaller the numerical value, the higher the execution priority. Therefore,
In this example, task A has a lower execution priority than tasks B, C, and D, and has a higher execution priority than task E.

For example, assuming that task A is a task that performs data transfer, tasks B, C, and D use a large amount of CPU resources. As a result of measuring the information transfer speed by transferring the test data in this state, if the information transfer speed is lower than the information recording speed, recording on the optical disc 20 cannot be performed.

The control unit of the host computer 2 raises the priority of the task A from level “5” to level “1” as shown in FIG.
More CPU resources can be given than tasks B and C. Therefore, the execution speed of the task A increases, and the information transfer speed to the optical disk drive 1 can be increased.

The system of the host computer 2 may raise the priority level, or the user may directly issue a command.

As described above, the information transfer speed is set to be higher than the information recording speed before actual data recording, so that a problem that the optical disk cannot be used due to a buffer underrun occurring during the recording can be prevented. And no other tasks on the host computer need to be stopped.

Next, data recording processing in the optical disk recording / reproducing system will be described. FIG. 7 is a flowchart showing a data recording process in the optical disk recording / reproducing system.

First, the control unit of the host computer 2
In step (indicated by "S" in the figure) 21, user data to be recorded on an optical disk is prepared on a host computer.

For example, when the optical disk 20 is a large-capacity recording medium such as a DVD-R, a maximum of several gigabytes of data can be recorded on a DVD-R, so that the data amount becomes very large. It is to be stored on a hard disk or the like connected to the computer 2.

Next, the control unit of the host computer 2
In step 22, a data recording request command is transmitted to the optical disk drive through the interface. For example,
The SCSI interface requests transmission of data with a WRITE command and transmits the size of transfer data.

When the CPU 10 of the optical disk drive 1 receives the data recording request command from the host computer in step 31, it issues a user data transfer request to the host computer in step 32, and repeats the process of receiving user data in step 33. Attempt to receive data of the transfer size.

In the processing in steps 32 and 33, the buffer manager requests the host computer to control the interface signal for data of a required size while receiving the user data while checking the amount of data stored in the buffer memory. Then, it is determined in step 34 whether or not all the user data has been received, and the processing in steps 32 and 33 is repeated until all the user data has been received from the host computer.

The host computer 2 receives the user data request from the optical disk drive in step 23, repeats the process of transmitting the user data in step 24, and responds to the control signal from the optical disk drive 1
Data on the hard disk is sequentially interfaced 4
To the optical disk drive 1 through
It is determined whether or not all the user data has been transmitted, and the processing of steps 23 and 24 is repeated until all the user data has been transmitted to the optical disk drive.

The buffer manager 12 of the optical disk drive 1 sequentially stores data received from the host computer 2 on the buffer memory 13. When the amount of data in the buffer memory 13 is small, the data transfer request to the host computer 2 is continued.

When the amount of data in the buffer memory 13 increases and data overflows at the next reception,
The data transfer request to the host computer 2 is temporarily suspended, and the request is stopped until the buffer memory 13 becomes available.

Further, the buffer manager 12 sends the user data in the buffer memory 13 to the encoder / decoder 14 in the order in which they are stored, simultaneously with the control of the data request and the stop. The transmission speed is actually
To match the recording speed. Therefore, the difference between the information transfer speed and the information recording speed is absorbed, and the optical disk 2
Recording to 0 becomes possible.

In this manner, when the information transfer speed is not sufficient and the recording operation with the optical disk drive cannot be performed, the information transfer speed higher than the information recording speed can be secured by the operation on the host computer side. The recording operation in the optical disk drive can be enabled without stopping other tasks operating on the host computer.

The function described above is an effective means when it is not desired to change the priority level of a task other than the task for transferring data.

(2) Processing according to claim 2 in this optical disk recording / reproducing system FIG. 8 is a flowchart showing processing according to claim 2 of the present invention in this optical disk recording / reproducing system. FIG. 9 is an explanatory diagram of the task priority after the change of the host computer by the processing according to claim 2 of the present invention shown in FIG.

First, the host computer 2 attempts to transfer test data to the optical disk drive 1 in order to measure the information transfer speed on the interface 4.

As shown in FIG. 8, the host computer 2
The control unit prepares test data on the hard disk in the test data preparation process of step (indicated by “S” in the figure) 41.

The test data needs a certain data size in order to more accurately measure the information transfer speed. However, since the test data is not actually recorded on the optical disk 20, any data may be used.

When the test data has been prepared, the control section of the host computer 2 proceeds to step 42 and issues a request for transferring the test data to the optical disk drive.

The host computer 2 and the optical disk drive 1 are connected to an interface 4 such as SCSI or ATAPI.
, The request is issued through the command for the interface.

For example, in the case of a SCSI interface, a data transfer size is designated by a write (WRITE) command as shown in FIG. In this case, a protocol is set in advance so that the application on the host computer 2 and the firmware of the optical disk drive 1 can understand each other's commands.

When the CPU 10 of the optical disk drive 1 receives the test data transfer request from the host computer 2 in step 51, it receives the test data of the designated transfer size from the host computer 2 through the interface 4. To send a test data transfer request to the host computer 2 in step 52, receive test data in step 53, and proceed to step 54 to determine whether all test data has been received. The processing of sequentially receiving test data by the processing of steps 52 and 53 is repeated until it is determined that all test data has been received.

On the other hand, the control unit of the host computer 2
When a test data transfer request from the optical disk drive is received in step 43, test data is transmitted in step 44, and the process proceeds to step 45 to determine whether all test data has been transmitted, and all test data has been transmitted. The processing of steps 43 and 44 is repeated until the judgment is made, and the test data is sequentially transmitted to the optical disk drive 1 in accordance with the request from the optical disk drive 1.

In the optical disk drive 1, during actual recording, the data received by the buffer manager 12 is stored in the buffer memory 13, but this test data is not recorded, so the buffer manager 12 discards the received test data as it is. .

When the CPU 10 determines that the transfer of all the test data has been completed, the optical disk drive 1 proceeds to step 55 to obtain an information transfer speed based on the test data. To find that information transfer rate,
The means shown in (1) may be used.

Next, at step 56, the CPU 10 compares the information transfer speed obtained by the above measurement with the information recording speed on the optical disk 20, and determines whether or not the information transfer speed is higher than the information recording speed. .

The information recording speed on the optical disc 20 is determined by the speed of the disc. However, since the data sent as user data is recorded on the optical disc 20 after performing a data string conversion process as shown in FIG. 4, for example, the size of the user data is different from the actual recording size. Then, the information recording speed for the recording size is evaluated.

If the information transfer speed exceeds the information recording speed of the optical disk 20, that is, if the information transfer speed is determined to be higher than the information recording speed in the determination of step 56, the CPU 10 of the optical disk drive 1 actually stores the data. Since there is no problem in recording, the process proceeds to step 58, and the host computer 2
To the optical disk 20 that recording is possible.

The control section of the host computer 2 receives a recordable notification from the optical disk drive 1 in step 46 and determines whether or not recording is possible based on the notification in step 47. It is determined that recording on the optical disc 20 is possible at the information transfer speed, and the process ends.

Thereafter, in response to a recording request to the optical disk 20, data is transferred to the optical disk drive 1 at the current information transfer speed, and the optical disk drive 1 records the transferred data.

On the other hand, when the information transfer speed is lower than the information recording speed of the optical disk 20,
If it is determined in step 56 that the information transfer speed is not faster (slower) than the information recording speed, there is a great possibility that a buffer underrun will occur during normal data recording. It notifies that the recording on the optical disc 20 is not possible.

The control unit of the host computer 2 receives from the optical disc drive 1 at step 46 a notification indicating that recording is not possible, and at step 47 determines whether or not recording is possible based on the notification. It is determined that recording on the optical disk 20 is impossible if the information transfer speed is not changed, and the host computer 2 proceeds to step 48 to increase the information transfer speed of the interface 4 to increase the task priority. That is, the execution priority of the process of transferring information is increased.

Then, returning to step 42, a test data transfer request is output to the optical disk drive 1 again, and the processing of steps 42 to 48 is repeated, and the one optical disk drive 1 repeats the processing of steps 51 to 57.

That is, when the host computer 2 raises the priority of the task for transferring data,
The test data is re-transferred to the optical disk drive 1, and the process of re-transferring the test data and the process of further raising the priority of the process of transferring the data are repeated until there is a notice of recording from the optical disk drive 1.

On the other hand, in the optical disk drive 1, the measurement of the information transfer speed based on the test data,
Comparison of the measured information transfer speed and information recording speed,
The process of notifying that recording is possible or not to the host computer 2 based on the comparison result is repeated.

In this way, in response to the recording request to the optical disk 20, the data transfer to the optical disk drive is performed at the information transfer speed higher than the information recording speed by raising the execution priority, and the optical disk drive transmits the transferred data. Make a record.

The processing for repeatedly raising the task priority in the host computer 2 is, for example,
Assuming that task A in the model shown in FIG. 5 is a task that performs data transfer, tasks B, C, and D have many CPUs.
Resources are being taken. As a result of measuring the information transfer speed by transferring the test data in this state, if the information transfer speed is lower than the information recording speed, recording on the optical disc 20 cannot be performed.

Therefore, as shown in FIG. 6, the control unit of the host computer 2 raises the priority of the task A from the level “5” to the level “1”, and transfers the test data again.

On the other hand, the optical disk drive 1 measures the information transfer speed again based on the test data. If the information transfer speed is still lower than the information recording speed, the optical disk drive 1 notifies the host computer 2 again that the recording is impossible. The host computer 1 raises the priority level of the task A again based on the notification.

For example, as shown in FIG. 9, by raising the priority level of task A to "-6", the information transfer speed is further increased. Repeat this process,
Task A until the information transfer speed becomes higher than the information recording speed
, The recording on the optical disc 20 becomes possible.

If the information transfer speed is still not satisfied even if the priority level of the task A is raised to the highest priority, recording on the optical disk 20 is impossible.
Processing such as stopping the task itself for recording information is required.

The priority level may be raised by the system of the host computer 2 or a user may directly issue a command.

In this way, when the information transfer speed is not sufficient and the recording operation with the optical disk drive cannot be performed, the information transfer speed higher than the information recording speed can be secured by the operation on the host computer side. Enables a recording operation on an optical disk drive without stopping other tasks running on the host computer and minimizing a change in the execution priority of the task running on the host computer. be able to.

The function described above is an effective means when it is not desired to change the priority level of a task other than the task for transferring data.

(3) Processing according to claim 3 in this optical disk recording / reproducing system FIG. 10 shows tasks after the host computer is changed by the processing according to claim 3 of the present invention in the optical disk recording / reproducing system shown in FIG. FIG. 4 is an explanatory diagram of priority.

First, the host computer 2 attempts to transfer test data to the optical disk drive 1 in order to measure the information transfer speed on the interface 4.

The control unit of the host computer 2 prepares test data on a hard disk in a test data preparation process. The test data needs a certain data size in order to measure the information transfer speed more accurately. However, since the test data is not actually recorded on the optical disc 20, any data may be used.

When the test data has been prepared, the control section of the host computer 2 issues a test data transfer request to the optical disk drive. Since the host computer 2 and the optical disk drive 1 are connected by an interface 4 such as SCSI or ATAPI, a request is issued through a command for the interface.

For example, in the SCSI interface, a data transfer size is designated by a write (WRITE) command as shown in FIG. In this case, a protocol is set in advance so that the application on the host computer 2 and the firmware of the optical disk drive 1 can understand each other's commands.

Upon receiving the test data transfer request from the host computer 2, the CPU 10 of the optical disk drive 1
In order to receive the test data of the specified transfer size from, the control signal of the interface 4 is operated, a test data transfer request is issued to the host computer 2, the test data is received, and all the test data are received. It is determined whether the test data has been received or not, and the process of sequentially receiving test data by the above process is repeated until it is determined that all test data has been received.

On the other hand, the control unit of the host computer 2
Upon receiving a test data transfer request from the optical disk drive, the test data is transmitted, it is determined whether all test data has been transmitted, and the above processing is repeated until it is determined that all test data has been transmitted. The test data is sequentially transmitted to the optical disk drive 1 in accordance with the request from the optical disk drive 1.

In the optical disk drive 1, during actual recording, the data received by the buffer manager 12 is stored in the buffer memory 13, but this test data is not recorded, so that the buffer manager 12 discards the received test data as it is. .

When the CPU 10 determines that the transfer of all test data has been completed, the optical disk drive 1 obtains an information transfer speed based on the test data. In order to obtain the information transfer speed, the means described in the above (1) may be used.

Next, the CPU 10 compares the information transfer speed obtained by the above measurement with the information recording speed on the optical disk 20 and determines whether or not the information transfer speed is higher than the information recording speed.

The information recording speed on the optical disk 20 is determined by the speed of the disk. However, since the data sent as user data is recorded on the optical disk 20 after performing the data string conversion process shown in FIG. 4, the size of the user data is different from the actual recording size. Evaluate all information recording speeds.

When the information transfer speed exceeds the information recording speed of the optical disk 20, that is, when it is determined that the information transfer speed is higher than the information recording speed, the CPU 10 of the optical disk drive 1 also performs the actual data recording. Since there is no problem, the host computer 2 is notified via the interface 4 that recording on the optical disk 20 is possible.

The control unit of the host computer 2 receives a recordable notification from the optical disk drive 1 and determines whether or not recording is possible based on the notification. In the case of this notification, the optical disk 20 is recorded at the current information transfer speed. Then, it is determined that recording to the destination is possible, and the process ends.

Thereafter, in response to a recording request to the optical disk 20, data is transferred to the optical disk drive at the current information transfer speed, and the optical disk drive records the transferred data.

On the other hand, when the information transfer speed is lower than the information recording speed of the optical disc 20,
If it is determined that the information transfer speed is not faster (slower) than the information recording speed, it is very likely that a buffer underrun will occur during normal data recording, so the host computer 2 is notified that recording on the optical disk 20 is not possible.

The control section of the host computer 2 receives the notification of recording failure from the optical disk drive 1 and judges whether or not recording is possible based on the notification. In the case of this notification, the current information transfer speed is maintained. When the host computer 2 determines that recording on the optical disc 20 is impossible, the host computer 2 increases the transfer speed of the interface 4 as follows.
Reduce the priority of tasks other than the task that transfers data. That is, the execution priority of processes other than the process of transferring information is reduced.

After that, in response to the recording request to the optical disk 20, the data transfer to the optical disk drive 1 is performed at the information transfer speed higher than the information recording speed by lowering the execution priority, and the optical disk drive 1 is transferred. Record data.

In the process of lowering the priority of the other task in the host computer 2, for example, if task A in the model shown in FIG. Resources are being taken. As a result of measuring the information transfer speed by transferring the test data in this state, if the information transfer speed is lower than the information recording speed, recording on the optical disc 20 cannot be performed.

Therefore, the control unit of the host computer 2 can give more CPU resources by lowering the priority of the task B from level “2” to level “6” as shown in FIG. The execution speed of the task A is increased, and the information transfer speed to the optical disk drive 1 can be increased.

The priority level may be raised by the system of the host computer 2 or a user may directly issue a command.

In this way, when the information transfer speed is not sufficient and the recording operation with the optical disk drive cannot be performed, the information transfer speed higher than the information recording speed can be secured by the operation on the host computer side. The recording operation in the optical disk drive can be performed without stopping other tasks operating on the host computer.

The function described above is an effective means when it is not desired to change the priority level of the task for performing data transfer.

(4) Processing according to claim 4 in this optical disk recording / reproducing system FIG. 11 shows the task after the host computer is changed by the processing according to claim 4 of the present invention in the optical disk recording / reproducing system shown in FIG. FIG. 4 is an explanatory diagram of priority.

First, the host computer 2 attempts to transfer test data to the optical disk drive 1 in order to measure the information transfer speed on the interface 4.

The control section of the host computer 2 prepares test data on a hard disk in a test data preparation process. The test data needs a certain data size in order to measure the information transfer speed more accurately. However, since the test data is not actually recorded on the optical disc 20, any data may be used.

When the test data is prepared, the control unit of the host computer 2 issues a test data transfer request to the optical disk drive. Since the host computer 2 and the optical disk drive 1 are connected by an interface 4 such as SCSI or ATAPI, a request is issued through a command for the interface.

For example, in the case of the SCSI interface, a data transfer size is designated by a write (WRITE) command as shown in FIG. In this case, a protocol is set in advance so that the application on the host computer 2 and the firmware of the optical disk drive 1 can understand each other's commands.

When the CPU 10 of the optical disk drive 1 receives the test data transfer request from the host computer 2 in step 51, the CPU 10 receives the test data of the designated transfer size from the host computer 2 through the interface 4. To send a test data transfer request to the host computer 2, receive the test data, determine whether all the test data has been received, and determine that all the test data has been received. The process of sequentially receiving test data by the above process is repeated.

On the other hand, the control unit of the host computer 2
When a test data transfer request from the optical disk drive 1 is received, test data is transmitted, it is determined whether all test data has been transmitted, and the above processing is repeated until it is determined that all test data has been transmitted. The test data is sequentially transmitted to the optical disk drive 1 in accordance with the request from the drive 1.

In the optical disk drive 1, during actual recording, the data received by the buffer manager 12 is stored in the buffer memory 13, but this test data is not recorded, so the buffer manager 12 discards the received test data as it is. .

When the CPU 10 determines that the transfer of all test data has been completed, the optical disk drive 1 obtains an information transfer speed based on the test data. In order to obtain the information transfer speed, the means described in the above (1) may be used.

Next, the CPU 10 compares the information transfer speed obtained by the above measurement with the information recording speed on the optical disc 20 and determines whether or not the information transfer speed is higher than the information recording speed.

The information recording speed on the optical disc 20 is determined by the speed of the disc. However, since the data sent as user data is recorded on the optical disc 20 after performing a data string conversion process as shown in FIG. 4, for example, the size of the user data is different from the actual recording size. Then, the information recording speed for the recording size is evaluated.

When the information transfer speed exceeds the information recording speed of the optical disk 20, that is, when it is determined that the information transfer speed is higher than the information recording speed, the CPU 10 of the optical disk drive 1 also performs the actual data recording. Since there is no problem, the host computer 2 is notified via the interface 4 that recording on the optical disk 20 is possible.

The control unit of the host computer 2 receives a recordable notification from the optical disk drive 1 and determines whether or not recording is possible based on the notification. In the case of this notification, the optical disk 20 is recorded at the current information transfer speed. Then, it is determined that recording to the destination is possible, and the process ends.

Thereafter, in response to a recording request to the optical disk 20, data is transferred to the optical disk drive 1 at the current information transfer speed, and the optical disk drive 1 records the transferred data.

On the other hand, when the information transfer speed is lower than the information recording speed of the optical disc 20,
If it is determined that the information transfer speed is not faster (slower) than the information recording speed, it is very likely that a buffer underrun will occur during normal data recording, so the host computer 2 is notified that recording on the optical disk 20 is not possible.

The control section of the host computer 2 receives a notification that recording is not possible from the optical disk drive 1 and determines whether or not recording is possible based on the notification. In the case of this notification, the current information transfer speed is maintained. It is determined that recording on the optical disk 20 is impossible, and as a process for increasing the information transfer speed of the interface 4 in the host computer 2, the priority of tasks other than the task of transferring data is lowered. That is, the execution priority of processes other than the process of transferring information is reduced.

[0209] Then, a test data transfer request is output to the optical disk drive 1 again, and
, And repeats the process of lowering the priority of tasks other than the task of transferring data based on the notification. One of the optical disk drives 1 receives the test data from the host computer 2 and converts the test data into The information transfer speed is measured based on the measured information transfer speed, the measured information transfer speed is compared with the information recording speed, and the process of notifying that recording is possible or not based on the comparison result is repeated.

That is, when the host computer 2 decrements the priority of any task other than the task of transferring data, the host computer 2 re-transfers the test data to the optical disk drive 1 until a notice of recordable from the optical disk drive 1 is received. The process of re-transferring the test data and the process of further raising the priority of any task other than the process of transferring the data are repeated.

On the other hand, in the optical disk drive 1, the measurement of the information transfer speed based on the test data,
Comparison of the measured information transfer speed and information recording speed,
The process of notifying that recording is possible or not to the host computer 2 based on the comparison result is repeated.

In this way, the data transfer to the optical disk drive is performed at the information transfer speed higher than the information recording speed by reducing the execution priority in response to the recording request to the optical disk 20, and the optical disk drive transfers the transferred data. Make a record.

The process of repeating the task priority in the host computer 2 is as follows, for example.
Assuming that task A in the model shown in FIG. 5 is a task that performs data transfer, tasks B, C, and D have many CPUs.
Resources are being taken. As a result of measuring the information transfer speed by transferring the test data in this state, if the information transfer speed is lower than the information recording speed, recording on the optical disc 20 cannot be performed.

Therefore, as shown in FIG. 10, the control unit of the host computer 2 raises the priority of the task B from the level "2" to the level "6", and transfers the test data again.

On the other hand, the optical disk drive 1 measures the information transfer speed again based on the test data. If the information transfer speed is still lower than the information recording speed, the optical disk drive 1 notifies the host computer 2 again that the recording is impossible. The host computer 2 raises the priority level of the task A again based on the notification.

For example, as shown in FIG. 11, by lowering the priority level of task C from "2" to "6", the information transfer speed of task A is further increased. By repeating such processing and increasing the execution priority of the task A until the information transfer speed becomes higher than the information recording speed, recording on the optical disc 20 becomes possible.

The priority level may be raised by the system of the host computer 2 or a user may directly issue a command.

In this way, when the information transfer speed is not sufficient and the recording operation by the optical disk drive cannot be performed, the information transfer speed higher than the information recording speed can be secured by the operation on the host computer side. Enables a recording operation on an optical disk drive without stopping other tasks running on the host computer and minimizing a change in the execution priority of the task running on the host computer. be able to.

The function described above is an effective means when it is not desired to change the priority level of the task for performing data transfer.

(5) Processing according to claim 5 in this optical disk recording / reproducing system FIG. 12 shows the task after the host computer is changed by the processing according to claim 5 of the present invention in the optical disk recording / reproducing system shown in FIG. FIG. 4 is an explanatory diagram of priority.

First, the host computer 2 attempts to transfer test data to the optical disk drive 1 in order to measure the information transfer speed on the interface 4.

The control section of the host computer 2 prepares test data on a hard disk in a test data preparation process. The test data needs a certain data size in order to measure the information transfer speed more accurately. However, since the test data is not actually recorded on the optical disc 20, any data may be used.

When the test data is ready, the control section of the host computer 2 issues a test data transfer request to the optical disk drive. Since the host computer 2 and the optical disk drive 1 are connected by an interface 4 such as SCSI or ATAPI, a request is issued through a command for the interface.

For example, in the SCSI interface, a data transfer size is designated by a write (WRITE) command as shown in FIG. In this case, a protocol is set in advance so that the application on the host computer 2 and the firmware of the optical disk drive 1 can understand each other's commands.

Upon receiving the test data transfer request from the host computer 2, the CPU 10 of the optical disk drive 1
In order to receive the test data of the specified transfer size from, the control signal of the interface 4 is operated, a test data transfer request is issued to the host computer 2, the test data is received, and all the test data are received. It is determined whether the test data has been received or not, and the process of sequentially receiving test data by the above process is repeated until it is determined that all test data has been received.

On the other hand, the control unit of the host computer 2
Upon receiving a test data transfer request from the optical disk drive, the test data is transmitted, it is determined whether all test data has been transmitted, and the above processing is repeated until it is determined that all test data has been transmitted. The test data is sequentially transmitted to the optical disk drive 1 in accordance with the request from the optical disk drive 1.

In the optical disk drive 1, during actual recording, the data received by the buffer manager 12 is stored in the buffer memory 13, but this test data is not recorded, so the buffer manager 12 discards the received test data as it is. .

When the CPU 10 determines that the transfer of all the test data has been completed, the optical disk drive 1 obtains the information transfer speed based on the test data. In order to obtain the information transfer speed, the means described in the above (1) may be used.

Next, the CPU 10 compares the information transfer speed obtained by the above measurement with the information recording speed on the optical disk 20 and determines whether or not the information transfer speed is higher than the information recording speed.

The information recording speed on the optical disc 20 is determined by the speed of the disc. However, since the data sent as user data is recorded on the optical disk 20 after performing the data string conversion process shown in FIG. 4, the size of the user data is different from the actual recording size. Evaluate all information recording speeds.

When the information transfer speed exceeds the information recording speed of the optical disk 20, that is, when it is determined that the information transfer speed is higher than the information recording speed, the CPU 10 of the optical disk drive 1 performs the actual data recording. Since there is no problem, the host computer 2 is notified via the interface 4 that recording on the optical disk 20 is possible.

The control section of the host computer 2 receives a recordable notification from the optical disk drive 1 and determines whether or not recording is possible based on the notification. In the case of this notification, the optical disk 20 is recorded at the current information transfer speed. Then, it is determined that recording to the destination is possible, and the process ends.

Thereafter, in response to a recording request to the optical disk 20, data transfer to the optical disk drive is performed at the current information transfer speed, and the optical disk drive records the transferred data.

On the other hand, when the information transfer speed is lower than the information recording speed of the optical disc 20,
If it is determined that the information transfer speed is not faster (slower) than the information recording speed, it is very likely that a buffer underrun will occur during normal data recording, so the host computer 2 is notified that recording on the optical disk 20 is not possible.

The control section of the host computer 2 receives the notification of recording failure from the optical disk drive 1 and judges whether or not recording is possible based on the notification. In the case of this notification, the current information transfer speed remains unchanged. When the host computer 2 determines that recording on the optical disc 20 is impossible, the host computer 2 increases the transfer speed of the interface 4 as follows.
Stop other tasks other than the data transfer task.

Then, in response to a recording request to the optical disk 20, data transfer to the optical disk drive 1 is performed at an information transfer speed higher than the information recording speed by the above-described task stop processing. Record.

In the stop processing of the other task in the host computer 2, for example, if the task A performs data transfer in the model shown in FIG. 5, many CPU resources are allocated to the tasks B, C, and D. Has been taken. As a result of measuring the information transfer speed by transferring the test data in this state, if the information transfer speed is lower than the information recording speed, recording on the optical disc 20 cannot be performed.

Therefore, the control unit of the host computer 2 can allocate a large amount of CPU resources to the task A by stopping the task B as shown in FIG. The information transfer speed to the drive 1 can be increased.

The task to be stopped may be selected by the system of the host computer 2 or the user may directly issue a command.

In this way, when the information transfer speed is not sufficient and the recording operation by the optical disk drive cannot be performed, the information transfer speed higher than the information recording speed can be secured by the operation on the host computer side. It is possible to enable a recording operation in the optical disk drive.

(6) Processing according to claim 6 in this optical disk recording / reproducing system FIG. 13 shows the task after the host computer is changed by the processing according to claim 6 of the present invention in the optical disk recording / reproducing system shown in FIG. FIG. 4 is an explanatory diagram of priority.

First, the host computer 2 attempts to transfer test data to the optical disk drive 1 in order to measure the information transfer speed on the interface 4.

The control unit of the host computer 2 prepares test data on a hard disk in a test data preparation process. The test data needs a certain data size in order to measure the information transfer speed more accurately. However, since the test data is not actually recorded on the optical disc 20, any data may be used.

When the test data is prepared, the control section of the host computer 2 issues a test data transfer request to the optical disk drive. Since the host computer 2 and the optical disk drive 1 are connected by an interface 4 such as SCSI or ATAPI, a request is issued through a command for the interface.

For example, in the case of the SCSI interface, a data transfer size is designated by a write (WRITE) command as shown in FIG. In this case, a protocol is set in advance so that the application on the host computer 2 and the firmware of the optical disk drive 1 can understand each other's commands.

When the CPU 10 of the optical disk drive 1 receives the test data transfer request from the host computer 2 in step 51, the CPU 10 receives the test data of the designated transfer size from the host computer 2 through the interface 4. To send a test data transfer request to the host computer 2, receive the test data, determine whether all the test data has been received, and determine that all the test data has been received. The process of sequentially receiving test data by the above process is repeated.

On the other hand, the control unit of the host computer 2
When a test data transfer request from the optical disk drive 1 is received, test data is transmitted, it is determined whether all test data has been transmitted, and the above processing is repeated until it is determined that all test data has been transmitted. The test data is sequentially transmitted to the optical disk drive 1 in accordance with the request from the drive 1.

In the optical disk drive 1, during actual recording, the data received by the buffer manager 12 is stored in the buffer memory 13, but this test data is not recorded, so the buffer manager 12 discards the received test data as it is. .

When the CPU 10 determines that the transfer of all test data has been completed, the optical disk drive 1 obtains an information transfer speed based on the test data. In order to obtain the information transfer speed, the means described in the above (1) may be used.

Next, the CPU 10 compares the information transfer speed obtained by the above measurement with the information recording speed on the optical disk 20, and determines whether or not the information transfer speed is higher than the information recording speed.

The information recording speed on the optical disc 20 is determined by the speed of the disc. However, since the data sent as user data is recorded on the optical disc 20 after performing a data string conversion process as shown in FIG. 4, for example, the size of the user data is different from the actual recording size. Then, the information recording speed for the recording size is evaluated.

When the information transfer speed exceeds the information recording speed of the optical disk 20, that is, when it is determined that the information transfer speed is higher than the information recording speed, the CPU 10 of the optical disk drive 1 also performs the actual data recording. Since there is no problem, the host computer 2 is notified via the interface 4 that recording on the optical disk 20 is possible.

The control section of the host computer 2 receives a recordable notification from the optical disk drive 1 and determines whether or not recording is possible based on the notification. In the case of this notification, the optical disk 20 is recorded at the current information transfer speed. Then, it is determined that recording to the destination is possible, and the process ends.

Thereafter, in response to a recording request to the optical disk 20, data is transferred to the optical disk drive 1 at the current information transfer speed, and the optical disk drive 1 records the transferred data.

On the other hand, when the information transfer speed is lower than the information recording speed of the optical disc 20,
If it is determined that the information transfer speed is not faster (slower) than the information recording speed, it is very likely that a buffer underrun will occur during normal data recording, so the host computer 2 is notified that recording on the optical disk 20 is not possible.

The control section of the host computer 2 receives a notification that recording is not possible from the optical disk drive 1 and determines whether or not recording is possible based on the notification. In the case of this notification, the current information transfer speed is maintained. When it is determined that recording on the optical disk 20 is impossible, as a process of increasing the information transfer speed of the interface 4 in the host computer 2, any task other than the task of transferring data is stopped.

Then, a test data transfer request is output to the optical disk drive 1 again, and
The optical disk drive 1 receives the notification from the host computer 2 and repeats the process of stopping any other task other than the task of transferring data based on the notification. The information transfer speed is measured based on the data, the measured information transfer speed is compared with the information recording speed, and the process of notifying whether recording is possible or not based on the comparison result is repeated.

That is, when any of the tasks other than the task of transferring data is stopped, the host computer 2 re-transfers the test data to the optical disk drive 1,
Until the recording enable notification is received from the optical disk drive 1, the process of re-transferring the test data and the process of further stopping any task other than the process of transferring the data are repeated.

On the other hand, in the optical disk drive 1, the measurement of the information transfer speed based on the test data and the measurement of the information transfer speed until the host computer 2 no longer requests the transfer of the test data.
Comparison of the measured information transfer speed and information recording speed,
The process of notifying that recording is possible or not to the host computer 2 based on the comparison result is repeated.

In this way, the data transfer to the optical disk drive is performed at the information transfer speed higher than the information recording speed by stopping the other tasks in response to the recording request to the optical disk 20, and the optical disk drive transfers the transferred data. Make a record.

In the process of sequentially stopping other tasks in the host computer 2, for example, assuming that the task A performs data transfer in the model shown in FIG. 5, a large amount of CPU resources are allocated to the tasks B, C, and D. Has been taken. As a result of measuring the information transfer speed by transferring the test data in this state, if the information transfer speed is lower than the information recording speed, recording on the optical disc 20 cannot be performed.

Therefore, as shown in FIG. 12, the control section of the host computer 2 stops the task B and then transfers the test data again.

On the other hand, the optical disk drive 1 measures the information transfer speed again based on the test data. If the information transfer speed is still slower than the information recording speed, the optical disk drive 1 notifies the host computer 2 again that recording is impossible. The host computer 2 raises the priority level of the task A again based on the notification.

For example, as shown in FIG. 13, by stopping task C, the information transfer speed of task A is further increased. By repeating the stop processing of such other tasks and raising the execution priority of the task A until the information transfer speed becomes higher than the information recording speed, recording on the optical disc 20 becomes possible.

It should be noted that the task to be stopped may be selected by the system of the host computer 2 or the user may directly issue a command.

In this way, when the information transfer speed is not sufficient and the recording operation in the optical disk drive cannot be performed, the information transfer speed higher than the information recording speed can be secured by the operation on the host computer side. The recording operation in the optical disk drive can be enabled by minimizing the task to be stopped among other tasks operating on the host computer.

(7) Processing according to claim 7 in this optical disk recording / reproducing system In the same manner as in (5) and (6), the control unit of the host computer 2 sends the test data transferred to the optical disk drive 1 When receiving the notification that the recording to the optical disk 20 is not possible, the task having the highest execution priority among the tasks other than the task for performing the data transfer is selected and stopped.

For example, if task A is a task for data transfer as shown in FIG. 5, by stopping task D as shown in FIG.
A lot of U resources can be allocated, and this operation can increase the information transfer speed to the optical disk drive 1.

If the host computer 2 transfers the test data again after stopping the task D, the optical disk drive 1 measures the information transfer speed, and
If the information transfer speed is still slower than the information recording speed, the host computer 2 notifies the non-recording in the same manner as described above, so that the host computer 2 executes the task with the next highest execution priority among other currently running tasks. To stop.

Thus, the above processing is repeated,
By stopping other tasks one after another until the information transfer speed becomes faster than the information recording speed, recording on the optical disc 20 becomes possible.

In this way, when the information transfer speed is not sufficient and the recording operation by the optical disk drive cannot be performed, the information transfer speed higher than the information recording speed can be secured by the operation on the host computer side. It enables the recording operation of the optical disk drive and, among other tasks running on the host computer, stops from the task with the highest execution priority, so the number of stopped tasks can be minimized, and efficiency can be reduced. Task can be stopped.

(8) Processing according to claim 8 in this optical disk recording / reproducing system As in the above (5) and (6), the control unit of the host computer 2 executes the test data transferred to the optical disk drive 1 Upon receiving the notification that recording to the optical disk 20 is not possible, the task having the highest execution priority among the tasks other than the task for performing the data transfer and using the most CPU resources, that is, the processing at the time of the arithmetic processing by the CPU Select and stop the task with the highest occupancy.

For example, as shown in FIG. 5, when task A is a task that performs data transfer, it uses the CPU resource among tasks B, C, and D having a higher priority than task A. By stopping the task being executed, more CPU resources can be allocated to task A.
Can increase the information transfer speed.

If the host computer 2 stops the other tasks and transfers the test data again, the optical disk drive 1 measures the information transfer speed, and the information transfer speed is still lower than the information recording speed. If it is too late, the recording is notified in the same manner as described above, so that the host computer 2 has a higher execution priority than task A among other currently running tasks, and uses the next highest CPU resource. Stop a task that is running.

Thus, the processing as described above is repeated,
By stopping other tasks one after another until the information transfer speed becomes faster than the information recording speed, recording on the optical disc 20 becomes possible.

In this way, when the information transfer speed is not sufficient and the recording operation in the optical disk drive cannot be performed, the information transfer speed higher than the information recording speed can be secured by the operation on the host computer side. The recording operation of the optical disk drive is enabled, and among the other tasks operating on the host computer, the task having the highest execution priority and the highest CPU occupancy is stopped, so the number of stopped tasks is minimized. And the task can be stopped efficiently.

(9) Processing according to claim 9 in this optical disk recording / reproducing system As in the above (1) to (8), the control section of the host computer 2 transfers the test data to the optical disk drive 1 and Based on the test data, the drive 1 sends a notification to the host computer 2 that the optical disk 20 is recordable or unrecordable.

[0278] When the host computer 2 receives the recording disable notification from the optical disk drive 1,
A message notifying that data cannot be recorded on the optical disc 20 at the current information transfer speed is displayed on the display unit.

The user who is handling the host computer 2 understands this from the display screen, and performs an operation of stopping any other task running on the host computer 2. Therefore, the information transfer speed to the optical disk drive 1 can be increased, and recording on the optical disk 20 becomes possible.

As described above, when the information transfer speed is not sufficient and the recording operation by the optical disk drive cannot be performed, the host computer notifies the user of the fact, so that unnecessary tasks can be selected by the user's judgment. Can be stopped.

(10) Processing according to claim 10 in this optical disk recording / reproducing system As in the above (1) to (8), the control unit of the host computer 2 transmits the test data transferred to the optical disk drive 1 Then, the optical disk drive 1 sends a notification that recording to the optical disk 20 is possible or not to the host computer 2 based on the test data.

When the host computer 2 receives a recording disable notification from the optical disk drive 1,
Based on the information recording speed notified from the optical disk drive 1, an information transfer speed higher than the information transfer speed is obtained. The display unit indicates that data cannot be recorded on the optical disk 20 at the current information transfer speed. Display speed message.

The user handling the host computer 2 understands this from the display screen, and performs a task of stopping any other task operating on the host computer 2. Therefore, the information transfer speed to the optical disk drive 1 can be increased, and recording on the optical disk 20 becomes possible.

As described above, when the information transfer speed is not sufficient and the recording operation by the optical disk drive cannot be performed, the host computer notifies the user of the fact and the necessary information transfer speed. Unnecessary tasks can be selected and stopped, and it can be easily determined which task is most efficient to stop.

(11) Processing according to claim 11 in this optical disk recording / reproducing system As in the above (1) to (10), the host computer 2
The control unit transfers the test data to the optical disk drive 1, and the optical disk drive 1 sends a notification that the recording to the optical disk 20 is possible or not to the host computer 2 based on the test data. Then, when the host computer 2 receives the recording disable notification from the optical disc drive 1, the host computer 2 stops the task of performing data transfer.

In this way, when the information transfer speed is not sufficient and the recording operation in the optical disk drive cannot be performed, the task of performing the data transfer is stopped, so that the recording operation that makes the optical disk 20 unusable is performed. Can be avoided.

In the optical disk recording / reproducing system of this embodiment, the information transfer speed between the host computer and the optical disk drive is measured in advance, and only when the information transfer speed is faster than the information recording speed on the optical disk, the recording on the optical disk is performed. Is performed, so that buffer underrun does not occur during recording on the optical disk.

If the information transfer speed is lower than the information recording speed on the optical disk, various measures can be taken to further increase the information transfer speed by the host computer, so that the recording on the optical disk can be performed reliably.

[0289]

As described above, according to the information recording / reproducing system and the information recording / reproducing method of the present invention, it is possible to prevent a recording operation which may cause a buffer underrun during recording of information on a recording medium. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of an optical disc recording / reproducing system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a process according to claim 1 of the present invention in the optical disc recording / reproducing system shown in FIG.

FIG. 3 is a diagram showing a WRITE command configuration of a SCSI interface in the optical disc recording / reproducing system shown in FIG. 1;

FIG. 4 is a flowchart showing a process of converting user data into recorded data in the optical disc recording / reproducing system shown in FIG.

FIG. 5 is an explanatory diagram of the task priority before the change of the host computer by the processing according to claim 1 of the present invention shown in FIG. 2;

FIG. 6 is an explanatory diagram of the task priority after the host computer has been changed by the processing according to claim 1 of the present invention shown in FIG. 2;

FIG. 7 is a flowchart showing a recording operation process on a recording medium in the optical disc recording / reproducing system shown in FIG. 1;

FIG. 8 is a flowchart showing a process according to claim 2 of the present invention in the optical disc recording / reproducing system shown in FIG. 1;

FIG. 9 is an explanatory diagram of the task priority after the change of the host computer by the processing according to claim 2 of the present invention shown in FIG. 8;

FIG. 10 is an explanatory diagram of the task priority after the change of the host computer by the processing according to claim 3 of the present invention in the optical disk recording and reproducing system shown in FIG. 1;

FIG. 11 is an explanatory diagram of the task priority after the change of the host computer by the processing according to claim 4 of the present invention in the optical disk recording / reproducing system shown in FIG. 1;

FIG. 12 is an explanatory diagram of the task priority after the change of the host computer by the processing according to claim 5 of the present invention in the optical disk recording and reproducing system shown in FIG. 1;

FIG. 13 is an explanatory diagram of the task priority after the change of the host computer by the processing according to claim 6 of the present invention in the optical disk recording and reproducing system shown in FIG. 1;

FIG. 14 is an explanatory diagram of the task priority after the change of the host computer by the processing according to claim 7 of the present invention in the optical disk recording and reproducing system shown in FIG. 1;

[Explanation of symbols]

 1: optical disk drive 2: host computer 3: hard disk 10: CPU 11: host I / F 12: buffer manager 13: buffer memory 14: encoder / decoder 15: transfer speed measuring unit 16: signal processing unit 17: optical pickup unit 18 : Disk drive unit 19: Servo control unit 20: Optical disk

Claims (22)

[Claims] 1. An information recording / reproducing system comprising: an information recording / reproducing device for recording and reproducing information on and from a recording medium; and an information processing device for transferring the information to the information recording / reproducing device. Test information transfer means for transferring test information to the information recording / reproducing device before transferring the information, and execution priority of a process for transferring the information when a notification indicating that recording is impossible is received from the information recording / reproducing device. Transfer information priority executing means, and the information recording / reproducing apparatus has a test information receiving means for receiving test information transferred from the information processing apparatus; and the information processing apparatus based on the test information received by the information processing apparatus. An information transfer rate measuring means for measuring an information transfer rate from the device;
Means for comparing the information transfer speed measured by the means with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed; and An information recording / reproducing system, comprising: a recording-disabled notifying unit that notifies the information processing apparatus of a recording-disabled state when it is determined that the recording speed is not faster than the information recording speed. 2. An information recording / reproducing system comprising: an information recording / reproducing device for recording and reproducing information on and from a recording medium; and an information processing device for transferring the information to the information recording / reproducing device. Test information transfer means for transferring test information to the information recording / reproducing device before transferring the information, and execution priority of a process for transferring the information when a notification indicating that recording is impossible is received from the information recording / reproducing device. And re-transfer the test information to the information recording / reproducing device,
Means for repeating the re-transfer process and the process of further raising the execution priority of the process of transferring the information until the information recording / reproducing device no longer receives a notification indicating that recording is not possible; Test information receiving means for receiving the test information transferred from the processing device, information transfer speed measuring means for measuring the information transfer speed from the information processing device based on the test information received by the means,
Means for comparing the information transfer speed measured by the means with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed; and When it is determined that it is not faster than the information recording speed, it notifies the information processing device that recording is not possible, and until the information transfer speed is determined to be faster than the information recording speed, the comparison and the determination and the notification are performed. An information recording / reproducing system, comprising: means for repeating processing. 3. An information recording / reproducing system comprising: an information recording / reproducing device for recording and reproducing information on and from a recording medium; and an information processing device for transferring the information to the information recording / reproducing device. Test information transfer means for transferring test information to the information recording / reproducing device before transferring the information, and another process for transferring the information when receiving a notification indicating that recording is not possible from the information recording / reproducing device. Means for lowering the execution priority of the test information, wherein the information recording / reproducing apparatus includes: a test information receiving means for receiving test information transferred from the information processing apparatus; and the information processing apparatus based on the test information received by the means. An information transfer rate measuring means for measuring an information transfer rate from the device;
Means for comparing the information transfer speed measured by the means with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed; and An information recording / reproducing system, comprising: a recording-disabled notifying unit that notifies the information processing apparatus of a recording-disabled state when it is determined that the recording speed is not faster than the information recording speed. 4. An information recording / reproducing system comprising: an information recording / reproducing device for recording and reproducing information on and from a recording medium; and an information processing device for transferring the information to the information recording / reproducing device. Test information transfer means for transferring test information to the information recording / reproducing device before transferring the information, and another process for transferring the information when receiving a notification indicating that recording is not possible from the information recording / reproducing device. The test priority is lowered, the test information is re-transferred to the information recording / reproducing device, and the re-transfer process and the other processes for the process of transmitting the information are stopped until the recording disable notification from the information recording / reproducing device disappears. Means for repeating processing for further lowering the execution priority of the processing, wherein the information recording / reproducing apparatus receives the test information transferred from the information processing apparatus. A test information receiving means for an information transfer rate measuring means for measuring the speed of information transfer from the information processing apparatus based on the test information received by said means,
Means for comparing the information transfer speed measured by the means with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed; and When it is determined that it is not faster than the information recording speed, it notifies the information processing device that recording is not possible, and until the information transfer speed is determined to be faster than the information recording speed, the comparison and the determination and the notification are performed. An information recording / reproducing system, comprising: means for repeating processing. 5. An information recording / reproducing system comprising: an information recording / reproducing device for recording and reproducing information on and from a recording medium; and an information processing device for transferring the information to the information recording / reproducing device. Test information transfer means for transferring test information to the information recording / reproducing apparatus before transferring the information, and when receiving a notification indicating that recording is disabled from the information recording / reproducing apparatus, other than processing for transferring the information. Means for stopping the operation of processing, test information receiving means for receiving the test information transferred from the information processing apparatus in the information recording / reproducing apparatus, and information processing based on the test information received by the means. An information transfer rate measuring means for measuring an information transfer rate from the device;
Means for comparing the information transfer speed measured by the means with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed; and An information recording / reproducing system, comprising: a recording-disabled notifying unit that notifies the information processing apparatus of a recording-disabled state when it is determined that the recording speed is not faster than the information recording speed. 6. An information recording / reproducing system comprising: an information recording / reproducing device for recording and reproducing information on and from a recording medium; and an information processing device for transferring the information to the information recording / reproducing device. Test information transfer means for transferring test information to the information recording / reproducing apparatus before transferring the information, and when receiving a notification indicating that recording is disabled from the information recording / reproducing apparatus, other than processing for transferring the information. Stop the operation of the process, re-transfer the test information to the information recording / reproducing device, further process other than the re-transfer process and the process of transferring the information until there is no notification of the recording failure from the information recording / reproducing device. Means for repeating processing for stopping the operation of other processing, test information receiving means for receiving test information transferred from the information processing apparatus to the information recording / reproducing apparatus; And information transfer rate measuring means for measuring the speed of information transfer from the information processing apparatus based on the test information received by said means,
Means for comparing the information transfer speed measured by the means with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed; and When it is determined that it is not faster than the information recording speed, it notifies the information processing device that recording is not possible, and until the information transfer speed is determined to be faster than the information recording speed, the comparison and the determination and the notification are performed. An information recording / reproducing system, comprising: means for repeating processing. 7. The information recording / reproducing system according to claim 6, wherein said information processing apparatus is provided with means for stopping the processing in order of execution priority when said processing is stopped. Reproduction system. 8. The information recording / reproducing system according to claim 6, wherein the information processing apparatus has a higher execution priority than the processing of transferring the information when the processing is stopped, and occupies the processing during the arithmetic processing. An information recording / reproducing system, comprising means for stopping the processing in order from the processing having the highest rate. 9. An information recording / reproducing system comprising: an information recording / reproducing device for recording and reproducing information on and from a recording medium; and an information processing device for transferring the information to the information recording / reproducing device. Test information transfer means for transferring test information to the information recording / reproducing apparatus before transferring the information, and recording-disabled notice output means for outputting the notification when the recording-disabled notice is received from the information recording / reproducing apparatus. A test information receiving means for receiving test information transferred from the information processing apparatus, and an information transfer rate from the information processing apparatus based on the test information received by the information recording / reproducing apparatus. An information transfer rate measuring means for measuring;
Means for comparing the information transfer speed measured by the means with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed; and An information recording / reproducing system, comprising: a recording-disabled notifying unit that notifies the information processing apparatus of a recording-disabled state when it is determined that the recording speed is not faster than the information recording speed. 10. An information recording / reproducing system comprising: an information recording / reproducing device for recording and reproducing information on and from a recording medium; and an information processing device for transferring the information to the information recording / reproducing device. Test information transfer means for transferring test information to the information recording / reproducing apparatus before transferring the information, and when receiving a notification indicating that recording is not possible from the information recording / reproducing apparatus, outputting the notification to output the information recording / reproducing A required information transfer speed is obtained based on the information recording speed from the device, and a required information transfer speed output means for outputting the information transfer speed is provided. Test information receiving means for receiving test information; and information transfer rate measurement for measuring an information transfer rate from the information processing apparatus based on the test information received by the means. And the stage,
Means for comparing the information transfer speed measured by the means with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed; and An information recording / reproducing system, further comprising: a recording-disabled notifying unit that notifies the information processing apparatus of a recording-disabled state when it is determined that the recording speed is not faster than the information recording speed. 11. An information recording / reproducing system comprising: an information recording / reproducing apparatus for recording and reproducing information on and from a recording medium; and an information processing apparatus for transferring the information to the information recording / reproducing apparatus. Test information transfer means for transferring test information to the information recording / reproducing device before transferring the information, and stopping the operation of the process for transferring the information when receiving a recording disable notification from the information recording / reproducing device. Transfer information stopping means, a test information receiving means for receiving the test information transferred from the information processing apparatus, and the information recording / reproducing apparatus, based on the test information received by the means. Information transfer rate measuring means for measuring the information transfer rate of
Means for comparing the information transfer speed measured by the means with the information recording speed for the recording medium to determine whether or not the information transfer speed is higher than the information recording speed; and An information recording / reproducing system, comprising: a recording-disabled notifying unit that notifies the information processing apparatus that recording is not possible when it is determined that the recording speed is not faster than the information recording speed. 12. An information recording / reproducing method in which an information recording / reproducing apparatus records and reproduces information transferred from an information processing apparatus on a recording medium, wherein the information processing apparatus transmits the information before transmitting the information. The test information is transferred to a recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and determines an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, it notifies the information processing apparatus of the recording prohibition, and when the information processing apparatus receives the recording prohibition notification from the information recording / reproducing apparatus, Information recording and reproducing method characterized by advancing the execution priority of the process of transferring information. 13. An information recording / reproducing method in which an information recording / reproducing apparatus records and reproduces information transferred from an information processing apparatus on a recording medium, wherein the information processing apparatus transmits the information before transmitting the information. The test information is transferred to a recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and determines an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, it notifies the information processing apparatus of the recording prohibition, and when the information processing apparatus receives the recording prohibition notification from the information recording / reproducing apparatus, Advancing the execution priority of the process of transferring information, and retransmits the test data to the information recording and reproducing apparatus, the information processing apparatus,
The re-transfer process and the process of further increasing the execution priority of the process of transferring the information are repeated until the information recording / reproducing device loses the recording disable notification.The information recording / reproducing device has the information transfer speed of the information transfer speed. An information recording / reproducing method, wherein the comparing and judging process and the notification process are repeated until it is judged that the speed is higher than the information recording speed. 14. An information recording / reproducing method in which an information recording / reproducing apparatus records and reproduces information transferred from an information processing apparatus on a recording medium, wherein the information processing apparatus transmits the information before transmitting the information. The test information is transferred to a recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and determines an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, it notifies the information processing apparatus of the recording prohibition, and when the information processing apparatus receives the recording prohibition notification from the information recording / reproducing apparatus, Information recording and reproducing method characterized by move down the execution priority of other processes for the process of transferring information. 15. An information recording / reproducing method in which an information recording / reproducing apparatus records and reproduces information transferred from an information processing apparatus on a recording medium, wherein the information processing apparatus transmits the information before transmitting the information. The test information is transferred to a recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and determines an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, it notifies the information processing apparatus of the recording prohibition, and when the information processing apparatus receives the recording prohibition notification from the information recording / reproducing apparatus, The execution priority of another process with respect to the process of transferring information is deferred, and the test information is re-transferred to the information recording / reproducing device. The information transfer speed is determined to be higher than the information recording speed by repeating the process of further reducing the execution priority of the other processes with respect to the re-transfer process and the information transfer process until the information transfer speed is higher than the information recording speed. An information recording / reproducing method, wherein the comparison and determination and the notification process are repeated until the information is reproduced. 16. An information recording / reproducing method in which an information recording / reproducing apparatus records and reproduces information transferred from an information processing apparatus on a recording medium, wherein the information processing apparatus transmits the information before transferring the information. The test information is transferred to a recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and determines an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, it notifies the information processing apparatus of the recording prohibition, and when the information processing apparatus receives the recording prohibition notification from the information recording / reproducing apparatus, Information recording and reproducing method characterized by stopping the operation of the other processing other than the processing for transferring information. 17. An information recording / reproducing method in which an information recording / reproducing apparatus records and reproduces information transferred from an information processing apparatus on a recording medium, wherein the information processing apparatus transmits the information before transmitting the information. The test information is transferred to a recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and determines an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, it notifies the information processing apparatus of the recording prohibition, and when the information processing apparatus receives the recording prohibition notification from the information recording / reproducing apparatus, The operation of other processes other than the process of transferring the information is stopped, and the test information is re-transferred to the information recording / reproducing device, so that the information processing device loses the recording disable notification from the information recording / reproducing device. Repeat the process of stopping the operation of still other processes other than the process of transferring the information and the process of transferring the information until,
The information recording / reproducing method, wherein the information recording / reproducing apparatus repeats the comparison, the determination, and the notification process until it is determined that the information transfer speed is faster than the information recording speed. 18. The information recording / reproducing method according to claim 17, wherein the information processing apparatus stops the processes in descending order of execution priority when the processes are stopped. 19. The information recording / reproducing method according to claim 17, wherein the information processing device has a higher execution priority than a process of transferring the information when the process is stopped, and occupies a process during an arithmetic process. An information recording / reproducing method characterized by stopping processing in order from the processing having the highest rate. 20. An information recording / reproducing method in which an information recording / reproducing apparatus records and reproduces information transferred from an information processing apparatus on a recording medium, wherein the information processing apparatus transmits the information before transferring the information. The test information is transferred to a recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and determines an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, the information processing apparatus notifies the information processing apparatus of the recording impossibility, and when the information processing apparatus receives the recording impossibility notification from the information recording / reproducing apparatus, Information recording and reproducing method and outputting a knowledge. 21. An information recording / reproducing method in which an information recording / reproducing apparatus records and reproduces information transferred from an information processing apparatus on a recording medium, wherein the information processing apparatus transmits the information before transmitting the information. The test information is transferred to a recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and determines an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed with the information recording speed for the recording medium to determine whether the information transfer speed is higher than the information recording speed, and determining whether the information transfer speed is the information recording speed. When it is determined that the recording is not faster than that, the information processing apparatus notifies the information processing apparatus of the recording impossibility, and when the information processing apparatus receives the recording impossibility notification from the information recording / reproducing apparatus, And outputs the knowledge sought necessary information transfer rate on the basis of the information recording speed from the information recording and reproducing apparatus, the information recording and reproducing method and outputting the information transfer rate. 22. An information recording / reproducing method in which an information recording / reproducing apparatus records and reproduces information transferred from an information processing apparatus on a recording medium, wherein the information processing apparatus transmits the information before transmitting the information. The test information is transferred to a recording / reproducing device, and the information recording / reproducing device receives the test information transferred from the information processing device, and determines an information transfer speed from the information processing device based on the received test information. Measuring, comparing the measured information transfer speed and the information recording speed for the recording medium to determine whether the information transfer speed is faster than the information recording speed,
When it is determined that the information transfer speed is not faster than the information recording speed, it notifies the information processing device of a recording disable, and the information processing device receives a recording disable notification from the information recording / reproducing device. And stopping the operation of the process of transferring the information.