JPH06150558A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To efficiently process the record of data in a short time. CONSTITUTION:The user data area on an optical disk having the user data area, an alternate sector area and an alternate control information area is divided into plural sectors, and information is recorded in each divided sector. The alternate control information in the alternate control information area on the optical disk is read out to be stored in a RAM 15, and a defective sector in a specified sector where the data is recorded is detected by a CPU 13 based on the alternate control information stored in the RAM 15. Further, the data to be recorded in the defective sector detected at the time is recorded in an alternate sector in the alternate sector area, and thereafter, the data is recorded in the specified sector of the user data area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus for recording / reproducing information using a recording medium such as an optical disk.

[0002]

2. Description of the Related Art Recent technological developments related to information processing have been remarkable, and along with this, means for recording information in an ever-increasing capacity have been considered. One of them is information using a recording medium such as an optical disk. A recording / reproducing device is receiving attention.

In such an optical disc, a track is divided into a plurality of sectors and information is recorded in units of these sectors because it is necessary to speed up recording and access of variable length data.
I am trying to play it.

However, in general, regarding an optical disc,
It is known that the error rate is higher than that of other media such as a magnetic disk due to the material, manufacturing problems, and higher recording density.

Therefore, conventionally, ECC (E
error correction code),
A method of performing error correction to some extent in a sector has been considered. However, even such an ECC may not be able to completely correct the error. Therefore, as a method for coping with these, the replacement sector area is determined in advance, and data cannot be normally recorded, and the sector is regarded as a defect. It is considered that the data to be recorded in the defective sector should be recorded in the replacement sector area when the data is not recorded.

Here, the replacement sector area for recording the data of the defective sector is generally determined as a specific area at the time of disk initialization such as shipping of the optical disk or formatting of the optical disk.

In addition to such a replacement sector area, a replacement management information area is provided. The replacement management information area stores replacement management information for managing the defective sector and the replacement destination sector of the defective sector. The replacement management information here is updated each time a defective sector occurs due to the deterioration of the material of the optical disc or the adhesion of dust from the state where the disc is initialized such as when the optical disc is shipped or when it is formatted. It has become.

Here, FIGS. 3A and 3B show how a sector that could not be normally recorded during data recording is recorded as a defective sector in the alternate sector area. in this case,
As shown in FIG. 3A, the optical disc has track 1
When the sectors a and b are divided into defective sectors while the sector is divided into blocks,
On the other hand, in the replacement sector area 2, replacement sectors a ', b'
Are assigned.

When data is continuously recorded in the n blocks of the track 1 as described above, FIG.
As shown in FIG. 1, first, the head (not shown) seeks to the first sector at the left end of the track 1 in the figure, and data is recorded in each sector in sequence while moving the head from the first sector to the right side in the figure. In this case, if defective sectors a and b exist during data recording, these defective sectors a and b
In this case, data recording is skipped and data is continuously recorded up to the last sector. And
When the data recording in the last sector is completed, the head is sought in the replacement sector area 2, and the data to be recorded in the defective sectors a and b is recorded in the replacement sectors a ′ and b ′.

With this arrangement, the number of seeks for the replacement sector area 2 can be reduced and the processing time for recording data can be shortened as compared with the method of accessing the replacement sector each time a defective sector is detected. There are advantages.

[0011]

However, according to such a conventional method, the data is first recorded in the normal sector, and then the data to be recorded in the defective sector is recorded in the replacement sector. Therefore, it is necessary to hold data to be recorded in the defective sector in a buffer or the like until the data recording in the replacement sector is completed.

This means that when the host computer transfers the data to be recorded, the host computer waits until the recording of the data in the previous replacement sector is completed.
Since the next data transfer is required, it takes a long time to record the data for each time, and there is a problem that the data writing processing speed is slowed down as a whole. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an information recording / reproducing apparatus capable of performing data recording processing in a short time without waste.

[0013]

The present invention has a user data area, a replacement sector area for recording data to be recorded in a defective sector, and a replacement management information area for managing a replacement destination sector of a defective sector as replacement management information. An information recording / reproducing apparatus that divides at least a user data area of a recording medium into a plurality of sectors and records information in units of each divided sector, and means for reading and storing replacement management information in a replacement management information area of the recording medium. , Means for detecting a defective sector in a designated sector on which information is recorded based on the replacement management information stored in this means, and information to be recorded in the defective sector detected by this means in the replacement sector area. Means for recording in the replacement sector, and means for recording information in the designated sector in the user data area after recording the information in the replacement sector by this means And it is made of.

[0014]

As a result, according to the present invention, the defective sector in the designated sector on which information is recorded is examined based on the replacement management information, and when the defective sector is detected in the designated sector,
The information to be recorded in the defective sector is recorded in the replacement sector in the replacement sector area which is the replacement destination, and then the information is recorded in the designated sector in the user data area. This eliminates the need to hold the data to be recorded in the defective sector in the buffer or the like until the data recording in the replacement sector is completed, and the recording data is transferred in parallel with the recording in the designated sector. It is possible,
No more wasted time processing data records,
The processing speed can be increased.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of the same embodiment. In the figure, reference numeral 11 denotes an optical disc drive device, which is connected to a host computer 10 and records data on an optical disc (not shown) in response to a command from the host computer 10.
I am trying to play. In this case, the optical disc has, in addition to the user data area in one zone, a replacement sector area for recording data to be recorded in the defective sector, and a replacement management information area for managing the defective sector and the replacement sector of the defective sector. The format is used.

The optical disk drive device 11 uses SCSI as an interface with the host computer 10.
(Smoll Computer System Interface) Controller 12
And the SCSI controller 12 performs a handshake of commands, data, and the like.

The SCSI controller 12 includes a CPU 1
3 are connected. The CPU 13 receives a command sent from the host computer 10 via the SCSI controller 12 and controls recording and reproduction of data with respect to the optical disc. Also, CPU1
3, ROM14, RAM15, ODC (Optical Di
sk Controller) 16 and the recording / playback unit 17 are connected.

The ROM 14 is a fixed memory in which a control program for the CPU 13 is stored. RAM15
Is a work memory of the CPU 13. Also, ODC
Reference numeral 16 controls the data to be recorded and reproduced.
The operation is controlled by the CPU 4.
The ODC 16 includes a buffer RAM 18 and an ECC circuit 19
And the modulation / demodulation circuit 20 is connected.

The buffer RAM 18 is a buffer memory for data to be recorded and reproduced. The ECC circuit 19
An encoding process for adding an ECC (Error Correction Code) to user data and a decoding process for performing error correction by ECC are executed. In addition, the ECC circuit 19
Also has a verify function for determining whether there is a certain amount or more of defects in reproduced data by ECC.
The modulation / demodulation circuit 20 modulates a recording signal sent to the optical disc through the recording / reproducing unit 17, and demodulates a reproducing signal given from the optical disc through the recording / reproducing unit 17. Then, the recording / playback unit 17 uses the CPU 13
Data is recorded on the optical disk or reproduced from the optical disk in accordance with a control signal from the optical disk. Next, the operation of the embodiment thus configured will be described.

When a data recording command is sent from the host computer 10 to the optical disk drive device 11, the command is given to the CPU 13 via the SCSI controller 12.

Then, the CPU 13 puts the SCSI controller 12 into a data transferable state (Data Out Phase) and performs a handshake with the host computer 10. In this state, the SCSI from the host computer 10 is changed.
The print data transferred via the controller 12 is stored in the buffer RAM 18.

At the same time, the CPU 13 gives a control signal to the recording / reproducing section 17 to instruct the target sector for recording data in the user data area to seek the recording / reproducing head (not shown). Furthermore, the CPU 13
Instructs the ODC 16 of a sector range in which data is to be recorded and controls the data recorded in the ODC 16.

When the head seek is completed, C
The PU 13 instructs the recording / reproducing unit 17 to record data. Then, according to an instruction from the ODC 16, data is taken out from the buffer RAM 18 and given to the modulation / demodulation circuit 17. Then, after being modulated by the modulation / demodulation circuit 17, it is recorded from the recording / reproducing unit 17 to a target sector on the optical disc.

The ODC 16 continues such processing until the data is recorded in all the sector range designated by the CPU 13. Further, the CPU 13 uses the ODC 16 and the SC.
The operation of the SI controller 12 is monitored, and after the completion of recording the data in the target sector, a command end message is sent to the host computer 10 to end the data recording process. Next, in such a series of data recording processing, the processing when there is a defective sector in the designated sectors will be described with reference to the flowchart shown in FIG.

Also in this case, when a data recording command is sent from the host computer 10 to the optical disk drive device 11, this command is given to the CPU 13 via the SCSI controller 12.

When the CPU 13 instructs the ODC 16 on the range of sectors for recording data, first, the replacement management information corresponding to the designated sector area of the replacement management information area of the optical disc is stored in the RAM 15. It is determined whether there is any (step 201). Here, if the replacement management information is not stored in the RAM 15, step 202.
The replacement management information for the sector area designated by is read from the replacement management information area of the optical disc and stored in the RAM 15.

Next, from the host computer 10 to the SCS
The data transferred via the I controller 12 is stored in the buffer RAM 18 (step 203). Then, in step 204, the replacement management information stored in the RAM 15 is checked to determine whether or not there is a defective sector in the designated sector area. If there is a defective sector, the data to be recorded in the defective sector is recorded in the replacement sector in step 205. At this time, the data to be recorded in the replacement sector is the buffer RAM corresponding to the defective sector.
It is data of 18 addresses.

When the recording of the data is completed in the replacement sectors of all the defective sectors, the CPU 13 gives a control signal to the recording / reproducing section 17 so that the data is not recorded at the leading sector position of the sector area. Instruct to seek the recording / playback head. That is, CPU1
According to the instruction of 3, the head is jumped to the head of the designated sector to start recording the data in the normal sector (step 206).

Next, it is judged whether or not the sector for recording data is a defective sector by using the replacement management information stored in the RAM 6 (step 207). As a result, if it is a defective sector, one sector is skipped (step 208), and if it is a normal sector, one sector of data is recorded (step 209).

When the processing of one sector is completed, the data to be recorded next time is sequentially transferred from the host computer 10 to the address where the writing of the buffer RAM 18 is completed (step 211).

Thereafter, similar processing is sequentially performed for every one sector from the head of the designated sector, and if there is a defective sector, the sector is skipped and data is recorded only in the normal sector. Then, in step 210, after waiting until it is judged that the recording of the data for all the designated sectors is completed, the process proceeds to step 212, and if there is data to be recorded next, the process returns to step 204 and repeats the processing. If there is no data to be recorded next, the process ends. If there is data to be recorded next and the process returns to step 204, the next recording data is already stored in the buffer RAM 18 in step 211.

Therefore, in this way, whether or not there is a defective sector in the designated sector area is checked based on the replacement management information stored in the RAM 15, and if there is a defective sector, the data to be recorded in the defective sector is determined. Since data is recorded in the specified sector of the user data area after the data is recorded in the replacement sector of the replacement sector area and the recording of the data in the replacement sector of all defective sectors is completed, Data can be transferred in parallel with recording in the specified sector, compared to data that should be recorded in the defective sector in a buffer until data recording in the replacement sector is completed. It is possible to realize high-speed processing without wasting time on the recording processing.

The present invention is not limited to the above-described embodiments, but can be modified and implemented as appropriate without departing from the spirit of the invention.
For example, in the above-described embodiment, an example in which an optical disc is used as a recording medium has been described, but the present invention can be applied to other recording media such as a magneto-optical disc. Also, the buffer RAM1
In FIG. 8, the data of the replacement sector is stored at the address corresponding to it. For example, the data of the replacement sector is stored at the head address of the buffer RAM 18, and the order is designated by the pointer when reading. Good. Further, in the above description, the case where the data recording in the replacement sector is performed with respect to the defective sector managed as the replacement management information has been described. However, if a defective sector occurs during the data recording, it is not used. Search for replacement sector,
The same data as that recorded in the defective sector is recorded in the unused replacement sector, and the addresses of the defective sector and the replacement sector are stored in the replacement management information area as replacement management information. Also, although an optical disc in which a replacement management information area, a user data area, and a replacement sector area are provided in one zone is shown, the format is not limited to this, and other formats may be used.

[0035]

According to the present invention, the defective sector in the designated sector in which information is recorded is checked based on the replacement management information, and when the defective sector is detected in the designated sector, it is recorded in the defective sector. Information is recorded in the replacement sector of the replacement sector area, which is the replacement destination, and then the information is recorded in the designated sector of the user data area. It is not necessary to hold the data to be recorded in the sector in the buffer, etc., and it is possible to transfer the recording data in parallel with the recording in the designated sector, without wasting time in the data recording process. High-speed processing can be realized.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the embodiment.

FIG. 3 is a diagram for explaining recording of data in a conventional replacement sector area.

[Explanation of symbols]

10 ... Host computer, 11 ... Optical disk drive device, 12 ... SCSI controller, 13 ... CPU, 1
4 ... ROM, 15 ... RAM, 16 ... ODC (Optical Di
sk Controller), 17 ... Recording / reproducing unit, 18 ... Buffer RAM, 19 ... ECC (Error Correction Code) circuit,
20 ... Modulation / demodulation circuit.

Claims (1)

[Claims] 1. At least a user data area of a recording medium having a user data area, a replacement sector area for recording data to be recorded in a defective sector, and a replacement management information area for managing a replacement destination sector of a defective sector as replacement management information. In an information recording / reproducing apparatus which divides into a plurality of sectors and records information in units of each divided sector, means for reading and storing replacement management information in the replacement management information area of the recording medium, and replacement management information stored in this means Means for detecting a defective sector in a designated sector on which information is recorded, means for recording information to be recorded in the defective sector detected by this means in the replacement sector of the replacement sector area, Means for recording information in the designated sector of the user data area after recording the information in the replacement sector in Information recording and reproducing apparatus to be.