JPH06243591A - Method for controlling magneto-optical disk device - Google Patents

Abstract

PURPOSE:To obtain data capable of referring to at the time of maintenance of a magneto-optical disk and a magneto-optical disk device and also to obtain timing of saving data recorded on the magneto-optical disk, etc. CONSTITUTION:A format date is recorded in a vendor unique VU of a DMA of the magneto-optical disk 1, and when a sector alternation processing is generated, the history of this date is formed to be recorded in a secondary defect management list SDL of the magneto-optical disk 1. Then, when the occurrence frequency of the alternation processing is increased, a host device is warned of this effect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for a magneto-optical disk device using a rewritable magneto-optical disk as a recording medium.

[0002]

2. Description of the Related Art Generally, in a recording medium for recording and holding data, a period in which the data can be held is defined according to the characteristics of the recording medium. For example, a magneto-optical disk is guaranteed to have a data retention period of 5 to 10 years.

Further, as in recent years, when various kinds of information are converted into digital data and stored, it is required that the information be stored and used for a long period of time.

Therefore, when the recording reliability of the recording medium is deteriorated due to deterioration of the recording medium recording the information, the information is transferred to another new recording medium at an early stage and recorded. It is necessary to ensure that no information is lost.

[0005]

[Problems to be Solved by the Invention]
For example, in a magneto-optical disc, the date information when the information was recorded was not recorded as a recording medium.
A single magneto-optical disk device that uses a magneto-optical disk as a recording medium cannot manage the date of recorded information.

On the other hand, in the system software or application program of the host device that uses the magneto-optical disk device as an external recording device, when recording file data on the magneto-optical disk, usually record the recording date and time data indicating the recording date and time. By doing so, version management of file data can be performed.

Therefore, the user refers to the recording date and time data recorded together with the file data to determine that the information recorded on the magneto-optical disk is old and should be transferred to another recording medium. , Need to be done manually.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a control method of a magneto-optical disk device capable of performing date management of data recorded on a magneto-optical disk.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a method of controlling a magneto-optical disk device using a rewritable magneto-optical disk as a recording medium, comprising clock means for outputting current date information, and initializing the magneto-optical disk. Sometimes, the date and time information obtained from the clock means at that time is recorded in an unused area of a predetermined sector.

In addition, a rewritable magneto-optical disk is used as a recording medium, and data of a sector in which an error occurs during data recording is recorded in an alternative sector, and management information representing the alternative situation is recorded in a predetermined sector area. In the control method of the magnetic disk device, a clock means for outputting the current date information is provided, and when the first alternative process of the magneto-optical disk occurs, the date and time information obtained from the clock means at that time is stored as the management information. The data is recorded in an unused area of a predetermined sector area to be recorded.

In addition, a rewritable magneto-optical disk is used as a recording medium, and data of a sector in which an error occurs during data recording is recorded in an alternative sector, and management information indicating the alternative situation is recorded in a predetermined sector area. In a method of controlling a magnetic disk device, a clock means for outputting current date information is provided, and when alternative processing occurs during data recording, the date and time information obtained from the clock means at that time is stored in a predetermined sector for recording the management information. Additional recording is performed in the alternative processing history information recording area set in the unused area of the area.

Further, in a control method of a magneto-optical disk device using a rewritable magneto-optical disk as a recording medium, a clock means for outputting current date information is provided, and at the time of initialization of the magneto-optical disk, the clock means is provided at that time. The date information obtained from the above is recorded as a format date in an unused area of a predetermined sector, and when a predetermined period has elapsed from the format date, a warning of the passage of the predetermined period is given at a predetermined timing.

In addition, a rewritable magneto-optical disk is used as a recording medium, and data of a sector in which an error occurs during data recording is recorded in an alternative sector, and management information representing the alternative situation is recorded in a predetermined sector area. In a method of controlling a magnetic disk device, a clock means for outputting current date information is provided, and when alternative processing occurs during data recording, the date and time information obtained from the clock means at that time is stored in a predetermined sector for recording the management information. In addition to additionally recording in the alternative process history information recording area set in the unused area of the area, when the alternative process occurrence frequency in a predetermined period exceeds a predetermined value, a warning to that effect is given.

[0014]

Therefore, since the user can refer to the format date of the magneto-optical disk, the user can clearly know how much time has passed since the data was first recorded. In addition, when the data is recorded on the magneto-optical disk, it is possible to refer to the date when the alternative process first occurred, so if there are frequent data errors on the magneto-optical disk, how much has occurred since the first data error occurred? You can see how long the period of
Important information can be provided during maintenance of the magneto-optical disk device. Further, since the history information of the alternative process is recorded, the amount of information that can be referred to during maintenance increases, and maintenance work can be efficiently performed.

[0015]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 shows a magneto-optical disk according to an embodiment of the present invention. In the following description, as the information format (recording format format) of the magneto-optical disk,
The one according to the so-called ISO standard is used.

A large number of concentric recording tracks are formed on the magneto-optical disk 1, and each recording track is divided into 25 sectors as shown in FIG. 2 (a). Further, as shown in FIG. 2B, each sector has a header portion HD in which a synchronization signal and addresses of the sector (track address and sector address) are recorded, and a recording portion DD in which user data can be recorded. Consists of.

Further, the recording section DD, as shown in FIG. 3C, has a data area DA in which 512 bytes of user data can be recorded and an error correction for correcting the data recorded in the data area DA. It consists of an error correction area EA in which the code ECC is arranged. Further, in the last part of the data area DA, vendor unique data VU capable of recording arbitrary data, and an error detection code CRC for detecting an error in the data area DA including the vendor unique data VU.
The area in which is arranged is set in addition to the 512-byte data recordable area. User data is not normally recorded in the vendor unique data VU.

FIG. 3A shows an example of a track format in the magneto-optical disk 1. This format is an ISO standard track format when the entire area is set as a data recordable area.

Track number 0 to track number 9999
Up to the area where data can be recorded by the drive. Of these, track number 3 to track number 99
Up to 96 are set in the user data area. Further, two defect management areas DMA1 and DMA2 are continuously arranged in the portion from the track number 0 to the track number 3, and two defect management areas are provided in the portion from the track number 9997 to the track number 9999. DMA
3, DMA4 are continuously arranged.

Track number -1 and track number 1
0000 is set in the buffer track, the part from track number -2 to track number -16 is set to the area for inner side control, and the part from track number 1001 to track number 10015 is set to outer side control area. It is set.

Here, four defect management areas DMA1, D
The same information is recorded in MA2, DMA3, and DMA4, so that even if the contents of one of the defect management areas cannot be read, the contents of the other defect management areas can be read. That is, a plurality of pieces of the same information are arranged in a distributed manner to form a state resistant to data errors.

Defect management area DMA (DMA1, DMA
2, DMA3, DMA4) format examples are shown in FIG.

In the defect management area DMA, a disk structure management table DDS for referring to the state of the magneto-optical disk 1 and management information of defective sectors, at the time of formatting, etc.
A primary defect management table PDL for registering a defective sector found at a stage before recording user data, and a sector found at the time of recording user data and the recorded data of the sector are replaced and recorded. Secondary defect management table SDL for registering the relationship with the existing alternative sector
Are arranged in this order. These disk structure management table DDS, primary defect management table PDL, and secondary defect management table S
Each DL occupies a data area for one sector.
The disk structure management table DDS, the primary defect management table PDL, and the secondary defect management table SDL are information elements defined by the ISO standard format.

Further, in this embodiment, the secondary defect management table S
The secondary defect management table SDL is placed in the empty area behind the DL.
An alternative date management table RDL for storing history information of the date when the content registered in (i.e., the sector alternative process) occurs is arranged. That is, the alternative date management table RDL is an information element other than the ISO standard.

An example of the contents of the disk structure management table DDS is shown in FIG.

This disk structure management table DDS is a DDS identifier for indicating that this sector stores the disk structure management table DDS, whether the magneto-optical disk 1 has a partial ROM area, or the entire disk. Represents the disk initial state information that indicates whether the disk is formatted in the inspection status, the group number information that stores the number of groups set in the user data area, and the number of data sectors per group. Data sector number information, alternative sector number information indicating the number of alternative sectors per group, ROM area management data required to access the ROM area, start sector (track number and (in-track) sector number) of the primary defect management table PDL ) Indicating the PDL start position information and opening of the secondary defect management table SDL. Consisting of SDL start position information that represents the sector.

An example of the contents of the primary defect management table PDL is shown in FIG.

The primary defect management table PDL includes a PDL identifier for indicating that this sector stores the primary defect management table PDL, defective sector number information indicating the number of defective sectors generated in the initial state, and , A defective sector address area in which the sector address (track number and sector number (in sector)) of each defective sector is stored.

An example of the contents of the secondary defect management table SDL is shown in FIG.

This secondary defect management table SDL has an SDL identifier for indicating that this sector stores the secondary defect management table SDL, and the length of the contents of this secondary defect management table SDL in bytes. The data length information represents the number of entries related to the replacement process registered in the secondary defect management table SDL, and the entry area represents the relationship between the defective sector and the replacement sector related to each replacement process. Here, one element (entry) of the entry area is composed of a defective sector address representing the sector address of the defective sector and an alternative sector address representing the sector address of the alternative sector.

An example of the contents of the alternative date management table RDL is shown in FIG.

This alternative date management table RDL represents an RDL identifier for indicating that this sector stores the alternative date management table RDL, and the number of alternative dates registered in this alternative date management table RDL. It is composed of alternative number information and an alternative date area for storing the date of each alternative process.

FIG. 5 shows a magneto-optical disk device according to an embodiment of the present invention.

In the figure, a control unit 2 is for controlling the operation of each unit of the magneto-optical disk device,
The drive mechanism circuit section 3 rotationally drives the magneto-optical disk 1 and records / reproduces / records data on / from the magneto-optical disk 1.
It consists of an erasing mechanism and its control / drive circuit.

The buffer memory 4 is for temporarily holding the data to be recorded on the magneto-optical disk 1 and the data read from the magneto-optical disk 1, and the clock circuit 5 uses the current date information. And the host interface circuit 6 for generating time information.
Is for connecting the magneto-optical disk device to a host device used as an external storage device and exchanging various data such as recording / reproducing data and control data with the host device.

FIG. 6 shows the magneto-optical disk 1 from the host device.
2 shows an example of processing executed by the control unit 2 when the format (initialization processing) is instructed.

First, date information is input from the clock circuit 5 (process 101), and it is checked whether or not the full-face inspection mode is designated as the format mode at that time (decision 102). When the result of determination 102 is YES, the recorded data is erased from all the sectors of the tracks of the magneto-optical disk 1, the test data having a predetermined bit pattern is recorded, and the recorded test data is reproduced and collated. A verify operation for checking whether they match is performed (process 103), and the inspection result is stored (process 104).

Next, initialization data of the disk structure management table DDS is created (process 105). At this time, the data of the above-described format is arranged in the user data of the data area DA of the disk structure management table DDS, and the content of the date information obtained at that time is arranged in the vendor unique VU of the data area DA. To do.

Further, as described above, data to be recorded in the primary defect management table PDL is created based on the inspection result stored in the process 104 (process 106). Further, the initialization data of the secondary defect management table SDL is created (Process 10).
7). The initialization data of the secondary defect management table SDL is the above-mentioned data and the value of the entry number information is set to 0.

Then, the contents of the disk structure management table DDS, the primary defect management table PDL and the secondary defect management table SDL created at that time are stored in the above-mentioned defect management area DMA1,
Record in DMA2, DMA3, DMA4 (Processing 10
8).

When the result of the judgment 102 is NO, the initialization data of the disk structure management table DDS similar to the above is created (process 109) and the initialization data of the primary defect management table PDL is created ( Process 110), initialization data of the secondary defect management table SDL similar to the above is created (process 1).
11). Here, as the initialization data of the primary defect management table PDL, the above-mentioned data in which the value of the defective sector number information is set to 0 is used.

In this way, the disk structure management table DD
S, primary defect management table PDL, and secondary defect management table S
When the DL initialization data is created, the process proceeds to step 108, and these contents are stored in the defect management areas DMA1, DMA2.
It records in DMA3 and DMA4.

Thus, in this embodiment, when the magneto-optical disk 1 is formatted, the vendor unique VU of the sector in which the disk structure management table DDS is recorded,
Since the date of the day is recorded, by referring to this recorded content, it is possible to easily obtain the period that has elapsed since the start of using the magneto-optical disk 1, and the reliability of the data recorded on this magneto-optical disk 1. It can be used as a criterion for determining the sex and for investigating the cause of frequent data errors.

7 (a) and 7 (b) show an example of processing when data recording is instructed from the host device.

First, a flag F for designating whether or not to execute the determination process of whether or not the alternative process frequently occurs.
RP is reset (process 201), the data transferred from the host device and stored in the buffer memory 4 is input by a recording unit (sector length) (process 202), and a target sector for recording the data is sought. The seek process is executed (process 203).

Then, a predetermined data recording process for recording data in the target sector is executed (process 204). In this data recording process, it is checked whether or not a data recording error has occurred (decision 205), and the result of judgment 205 is YES.
When it becomes, the flag FPR is set (process 20
6) Then, the sector in which a data recording error has occurred at that time is set as a defective sector and a predetermined sector replacement process is executed (process 207). In this sector replacement processing, the addition of an entry representing the relationship between the defective sector and the replacement sector obtained as a result of the replacement processing, the update of the secondary defect management table SDL by the addition of the entry, and the recording operation of the updated content are also executed. To do.

Then, the date information is obtained from the clock circuit 5 (process 208), and it is checked whether or not the sector replacement process occurring at that time is the first sector replacement process (decision 2).
09). When the result of the determination 209 is YES, the date information obtained at that time is recorded in the vendor unique VU of the sector in which the secondary defect management table SDL is recorded (process 210).

Then, the date information obtained at that time is added to the alternative date management table RDL as new alternative date information, and the operation of updating the alternative date management table RDL by adding the alternative date information and recording the updated contents. Is executed (process 211).

At that time, it is checked whether or not recording of all data has been completed (decision 212), and when the result of the determination 212 is NO, the process returns to step 202 to execute the operation of recording the next data. .

When the result of judgment 212 is YES, it is checked whether the flag FRP is set (decision 213). When the result of the determination 213 is YES, an alternative frequency inspection process is executed to determine whether the alternative process frequency is high (process 21).
4).

In this alternative frequency inspection process, when it is determined that the alternative frequency is high and the result of the determination 215 is YES, the host device is notified that the recording of the transferred data is completed (( Process 216) notifies the host device that the replacement frequency is high (process 217), and ends this data recording operation.

If it is determined in the alternative frequency inspection process that the alternative frequency is low and the result of the determination 215 is NO, the host device is notified that the recording of the transferred data has been performed. Then (process 218), the data recording operation is ended. Further, when the result of the determination 213 is NO, the process proceeds to the process 218. When the result of the determination 205 is NO, the process immediately proceeds to the determination 212.

FIG. 8 shows an example of the alternative frequency inspection process.

First, the date information is obtained from the clock circuit 5 (process 301), and the value of the counter i is initialized to 0 (process 302). Then, one piece of alternative date information is input from the alternative date area of the alternative date management table RDL (process 303), and it is checked whether or not the content of the alternative date information matches the date information obtained at that time (determination). 304), and when the result of the determination 304 is YES, the value of the counter i is incremented by 1 (process 305).

Then, it is checked whether or not the inspection has been completed for all the alternative date information in the alternative date area (decision 30).
6) If the result of determination 306 is NO, process 30
Return to 3 and perform a check on the remaining alternative date information.

When the result of the judgment 306 is YES, it is checked whether the value of the counter i is equal to or more than the predetermined value NA (decision 307). If the result of judgment 307 is NO, it means that the replacement frequency is normal (small),
Notify the process that called this alternative frequency process (process 30
8) If the result of determination 307 is YES, the process that called this alternative frequency process is notified that the alternative frequency is high (process 309).

In this way, in this embodiment, when the sector replacement process for the defective sector is executed when the data recording operation is executed, the replacement process date is added to the replacement date management table RDL, The alternative date management table RDL is updated. At the end of the data recording operation, when one or more alternative processes are executed in the data recording operation, it is determined whether or not the alternative process frequency is high, and when it is, the host device is notified to that effect. is doing.

Therefore, in the host device, by displaying the notification from the magneto-optical disk device to the user, the user can be alerted to the abnormal condition of the magneto-optical disk device or the abnormal condition of the magneto-optical disk 1. , It is possible to call attention to the reliability of the magneto-optical disk device and the magneto-optical disk to the user. This allows the user to perform maintenance work on the magneto-optical disk device,
Alternatively, operations such as saving the data recorded on the magneto-optical disk to another medium can be performed, and the safety of the recorded data can be ensured.

Further, by storing the notification from the magneto-optical disk device in the predetermined management information in the host device, it is possible to increase the reference data at the time of maintenance of the magneto-optical disk device, thereby making the maintenance work efficient. Can be implemented well.

Further, when the first sector replacement process of the magneto-optical disk 1 occurs, the date at that time is recorded in the vendor unique VU of the secondary defect management table SDL. This is convenient because you can see if a data error occurred in. Further, since the contents of the alternative date management table RDL can be directly referred to at the time of maintenance of the magneto-optical disk 1, the frequency of error occurrence can be appropriately referred to during maintenance work, which is very convenient.

In this case, the frequency inspection period in the alternative frequency inspection is set to one day, but this frequency inspection period is not limited to this.

FIG. 9 shows an example of processing when the magneto-optical disk 1 is mounted on the magneto-optical disk device and the medium detection state is set.

When the medium is detected, the magneto-optical disk 1 is started to rotate, the data recording / reproducing system is initialized, and the disk structure management table DDS is read from the disk defect management area DMA (process 40).
1) Input the contents of the vendor unique VU (process 40)
2).

Next, the media detection state is notified to the host device (process 403), and the format date information which is the contents of the vendor unique VU input at that time is notified to the host device (process 404).

As described above, since the format date information of the magneto-optical disk 1 is notified to the host device at the time of detecting the medium, the host device determines how long the magneto-optical disk 1 to be used is used. Can be determined.

By the way, in the above-mentioned embodiment, the case where the data format conforming to the ISO standard is adopted has been described, but the present invention is similarly applied to the case where other similar data formats are adopted. You can In that case, as in the above-described embodiment, it is preferable to record the format date, the occurrence date of the first sector replacement process, and the replacement date management table by appropriately utilizing the area that is vacant in terms of format.

Further, in the above-mentioned embodiments, the case where the present invention is applied to the magneto-optical disk device has been described, but the present invention is similarly applied to the device using the other data rewritable optical recording medium. can do.

[0069]

As described above, according to the present invention,
Since the user can refer to the format date of the magneto-optical disk, the user can clearly know how long the period has elapsed since the data was first recorded. In addition, when the data is recorded on the magneto-optical disk, it is possible to refer to the date when the alternative process first occurred, so if there are frequent data errors on the magneto-optical disk, how much has occurred since the first data error occurred? Therefore, it is possible to know whether or not the period has passed, and therefore important information can be provided at the time of maintenance of the magneto-optical disk device. Further, since the history information of the alternative process is recorded, the information that can be referred to at the time of maintenance is increased, and the effect that the maintenance work can be efficiently performed is obtained.

[Brief description of drawings]

FIG. 1 is a schematic view illustrating a magneto-optical disk according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of a physical format of the magneto-optical disk of FIG.

FIG. 3 is a schematic diagram showing an example of a track format of a magneto-optical disk.

FIG. 4 is a schematic diagram showing an example of contents of a disk structure management table, a primary defect management table, a secondary defect management table, and an alternative date management table.

FIG. 5 is a block diagram showing a magneto-optical disk device according to an embodiment of the present invention.

FIG. 6 is a flowchart showing an example of format processing.

FIG. 7 is a flowchart showing a processing example at the time of recording data.

FIG. 8 is a flowchart showing an example of an alternative frequency inspection process.

FIG. 9 is a flowchart showing a processing example when media is detected.

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location G11B 27/10 A 8224-5D

Claims (5)

[Claims] 1. A method of controlling a magneto-optical disk device using a rewritable magneto-optical disk as a recording medium, comprising clock means for outputting current date information, and at the time of initialization of the magneto-optical disk, the clock means is provided at that time. A method for controlling a magneto-optical disk device, characterized in that the date and time information obtained from the above is recorded in an unused area of a predetermined sector. 2. A light which uses a rewritable magneto-optical disk as a recording medium and records data of a sector in which an error occurs during data recording in an alternative sector and records management information indicating the alternative situation in a predetermined sector area. In the control method of the magnetic disk device, a clock means for outputting the current date information is provided, and when the first alternative process of the magneto-optical disk occurs, the date and time information obtained from the clock means at that time is stored as the management information. A method of controlling a magneto-optical disk device, characterized by recording in an unused area of a predetermined sector area to be recorded. 3. A light which uses a rewritable magneto-optical disk as a recording medium and records data of a sector in which an error has occurred during data recording in an alternative sector and records management information indicating the alternative situation in a predetermined sector area. In the control method of the magnetic disk device, a clock means for outputting the current date information is provided, and when the alternative process occurs at the time of data recording, the date and time information obtained from the clock means at that time,
A method of controlling a magneto-optical disk device, wherein the management information is additionally recorded in an alternative processing history information recording area set in an unused area of a predetermined sector area. 4. A method of controlling a magneto-optical disk device using a rewritable magneto-optical disk as a recording medium, comprising clock means for outputting current date information, and at the time of initialization of the magneto-optical disk, the clock means is provided at that time. The magneto-optical disk device is characterized in that the date information obtained from the above is recorded as a format date in an unused area of a predetermined sector, and when a predetermined period has passed from the format date, a warning of the passage of the predetermined period is given at predetermined timing. Control method. 5. A light which uses a rewritable magneto-optical disk as a recording medium, records the data of a sector in which an error has occurred during data recording in an alternative sector, and records management information indicating the alternative situation in a predetermined sector area. In the control method of the magnetic disk device, a clock means for outputting the current date information is provided, and when the alternative process occurs at the time of data recording, the date and time information obtained from the clock means at that time,
The management information is additionally recorded in an alternative processing history information recording area set in an unused area of a predetermined sector area, and when the frequency of alternative processing occurrence during a predetermined period exceeds a predetermined value, a warning to that effect is issued. A method of controlling a magneto-optical disk device, comprising: