JPH04360074A - Optical disk device control method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention uses a recording medium capable of recording/erasing/reproducing data, and is equipped with a sector replacement processing function for replacing a defective sector that causes a data error with another sector. There is a 3-pass recording mode in which the three operations of data erasing operation of the recording sector, recording operation of the recording data, and recording operation of the recording data are performed continuously, and two operations of the data erasing operation of the recording sector and the recording operation of the recording data are performed. The present invention relates to a control method for an optical disc device that allows selection of one of two consecutive two-pass recording modes.

0002

[Prior Art] Generally, in a magneto-optical disk device, when recording data on a recording medium (magneto-optical disk), after performing a data erasing operation to return the state of the sector in which data is to be recorded to a non-data recording state. The data recording mode is a 3-pass recording mode in which three operations are performed consecutively: recording data in the sector (recording operation), reading the recorded data and verifying whether it is the same as the original data (verification operation). is being carried out.

[0003] Here, a sector represents a data recording unit on a recording medium, and is a fixed length area such as 256, 512, 1024, 2048, 4096, etc. in terms of user data size, for example.

Furthermore, when a data error is detected in the verification operation, the sector in which the data error occurred is determined to be a defective sector, and a sector replacement process is performed to replace the defective sector with another sector, thereby updating the recorded data. This ensures that reliability can be maintained.

[0005]

However, in such a conventional device, when recording data, the same sector is accessed three times, resulting in the disadvantage that the time required for data recording becomes longer.

[0006] In order to solve this inconvenience, for example, it is conceivable to record data in a 2-pass recording mode in which the verification operation is omitted from among the 3-pass recording modes, but with magneto-optical disk drives, this is extremely difficult. Because data is recorded using a fine laser beam spot,
Due to the influence of dust entering the apparatus, the data error rate of the recording medium becomes relatively high, resulting in the inconvenience that recorded data cannot be read out properly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a control method for an optical disk device that can eliminate the disadvantages of the conventional device, shorten the time required for data recording, and ensure reliability of data recording.

[0008]

[Means for Solving the Problems] The present invention provides data recording/
It uses an erasable/reproducible recording medium and is equipped with a sector replacement processing function that replaces defective sectors that cause data errors with other sectors. It is possible to select either a 3-pass recording mode in which 3 operations of verifying recorded data are performed in succession, or a 2-pass recording mode in which 2 operations of data erasing of a recording sector and recording of recorded data are performed in succession. In a control method for an optical disk device, when initializing a recording medium, initialization data is recorded in all sectors in a 3-pass operation mode, and information on defective sectors discovered at that time and a verification operation are performed on the entire recording area. On the other hand, when recording data, if the recording medium records that the verification operation has been performed on the entire recording area, a sector replacement operation is performed based on the information of the defective sector, and Data is recorded in a two-pass operation mode for each sector.

[0009] Furthermore, the present invention uses a recording medium capable of recording/erasing/reproducing data, and is equipped with a sector replacement processing function that replaces a defective sector that causes a data error with another sector. , 3-pass recording mode in which the three operations of record data recording operation and record data verification operation are performed consecutively, and 2-pass recording mode in which the two operations of record sector data erasing operation and record data recording operation are performed consecutively. In a control method for an optical disk device that can select one of the recording modes, when initializing a recording medium, initialization data is recorded in all sectors in a 3-pass operation mode, and information on defective sectors discovered at that time is recorded. On the other hand, when recording data, if the recording medium records that the verification operation has been performed on the entire recording area, the verification operation is performed based on the information of the defective sector. At the same time, data is recorded in a two-pass operation mode for each sector.Furthermore, when a device error occurs during data recording, the data recorded at that time is verified and the data error is detected. When a data error is detected, the sector in which the data error has been detected is recorded as a defective sector, and a sector replacement process is applied to the sector.

0010

[Operation] Therefore, since all defective sectors are extracted when the recording medium is initialized, the influence of defective sectors can be eliminated even if the two-pass recording mode is performed during data recording. Further, when a device error occurs during a recording operation, a verification operation is performed on the sector data being recorded, so that the reliability of data recording can be improved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a magneto-optical disk device according to an embodiment of the present invention.

In the figure, a system control section 1 is for controlling the entire operation of this magneto-optical disk device, and a host interface circuit 2 is for controlling the operation of the entire magneto-optical disk device. (not shown), and the buffer control unit 3 is for controlling the exchange of recording data and playback data, and the buffer control unit 3 is for controlling the exchange of recording data and playback data. , are temporarily stored in the data buffer 4.

The magneto-optical disk drive device interface circuit 5 is for exchanging various data with the magneto-optical disk drive device 6, and is for exchanging various data with the magneto-optical disk drive device 6.
Data is exchanged between the magneto-optical disk drive device 6 and the magneto-optical disk drive device 6 using a predetermined command format.

The magneto-optical disk drive device 6 is for recording/erasing/reproducing data on the magneto-optical disk 7, and as a recording operation mode, it is used to return the state of the sector in which data is to be recorded to a non-data recording state. After performing the data erasing operation, three operations are performed in succession: recording data in that sector (recording operation), and reading out the recorded data and verifying whether it is the same as the original data (verification operation). It has two operation modes: a pass recording mode and a 2-pass recording mode in which the verification operation is omitted from the 3-pass recording mode.

The system control unit 1 also controls the recording area of the magneto-optical disk 7 by storing various information ( The system data area is divided into a system data area for storing system data) and a user data area for recording user data.

Further, the user data area is divided into sector blocks each consisting of a predetermined number of sectors, as shown in FIG.
As shown in c), the sector area is divided into a user sector area, which is a sector area that can be specified directly from the host device, and a replacement sector area, which cannot be specified directly from the host device, and is used by the system control unit 1 for sector replacement processing. The replacement sector area is normally used to replace a defective sector in the user sector area of the same sector block.

With the above configuration, when the system control unit 1 receives a command from the host device to initialize the magneto-optical disk 7,
Initialization processing as shown in FIG. 3 is performed.

First, select the sector to be initialized (processing 1
01), predetermined initialization data is set as recording data (processing 102), and a data recording command is output to the magneto-optical disk drive device 6 with the 3-pass recording mode set as the recording operation mode (processing 103). (Processing 104)
.

[0020] Thereby, the magneto-optical disk drive device 6 seeks the recording sector specified by the data recording command, and records the recording data transferred with the data recording command.
Record in the target sector in 3-pass recording mode. When the recording is finished, the system control unit 1 is notified whether the recording operation ended normally or ended with an error, and if the recording operation ended with an error, the operation that ended with the error is also notified.

After outputting the data recording command, the system control unit 1 waits until it is notified from the magneto-optical disk drive 6 that data recording has been completed (decision 10).
5), if the result of judgment 105 becomes YES, it is checked whether an error termination was notified at that time (judgment 106).

[0022] When the result of judgment 106 is YES, it is checked whether the error end operation notified at that time is a verification operation (judgment 107), and when the result of judgment 107 is YES, then register the sector specified as a recording sector as a defective sector (process 10
8).

[0023] Then, it is checked whether the initialization operation has been completed for all user sectors (decision 109), and when the result of determination 109 is NO, the process returns to process 101 in order to initialize the next sector. .

Further, when the result of judgment 109 is YES, data indicating that full-scale write initialization has been completed is registered in the system data (process 110), and this initialization process is terminated (normal termination). Further, when the result of determination 106 is NO, the process moves to process 109 and the subsequent processes are performed.

Further, when the result of the judgment 107 is NO, the cause of this error termination is caused by the magneto-optical disk drive device 6 (mechanical error), so the system control unit 1 determines whether the recorded data is the same as the one recorded. The magneto-optical disk drive device 6 is instructed to re-record the sector (process 111).

[0026] As a result, the magneto-optical disk drive device 6 seeks again the recording sector designated by the immediately previous data recording command, and records the stored recording data in the target sector again in the 3-pass recording mode. . When the re-recording is finished, the system control unit 1 is notified whether the re-recording operation has ended normally or with an error, and if it has ended with an error, the operation that ended with the error is also notified. do.

After issuing the re-recording command, the system control unit 1 waits until it is notified of the end of re-recording from the magneto-optical disk drive device 6 (NO loop of judgment 112), and if the result of judgment 112 is YES. When the error occurs, it is checked whether the process ended with an error (decision 113), and the result of determination 113 is NO.
When this happens, the re-recording operation has ended normally, so the process moves to process 109 and the subsequent processes are performed. Further, when the result of the judgment 113 is YES, it means that an error that cannot be recovered has occurred in the magneto-optical disk drive device 6, and therefore the process shifts to an abnormal end state.

In this abnormal termination state, the device operation is stopped, the host device is notified that a drive error has occurred, and data input from the host device is prohibited.

In this way, in this embodiment, first, when initializing the magneto-optical disk 7, an operation is performed to determine whether or not all user sectors are defective sectors. Register specific system data in the system data area that indicates that the process has been performed.

FIGS. 4 and 5 show that the magneto-optical disk 7 has one
It shows the operation of the system control unit 1 when recording data for a sector.

When the host device transfers recording data and instructs data recording, the system control unit 1
checks whether data indicating that full write has been initialized is registered in the system data area of the magneto-optical disk 7 (determination 201), and the result of determination 201 is YES.
When this happens, a recording operation using the following two-pass recording mode is performed.

That is, first, it is checked whether the target sector designated by the host device is registered as a defective sector (determination 202). The result of judgment 202 is NO.
When this happens, the target sector designated by the host device is set as the recording sector (process 203), and judgment 20
When the result of step 2 is YES, an alternative sector corresponding to the target sector is searched for and the alternative sector is set as a recording sector (process 204).

Further, the print data transferred from the host device is set as the print data (process 205), and the 2-pass print mode is set as the print operation mode (process 205).
06), a data recording command is output to the magneto-optical disk drive device 6 (process 207).

As a result, the magneto-optical disk drive device 6 seeks the recording sector designated by the data recording command, and records the recording data transferred with the data recording command.
Record to the target sector in 2-pass recording mode. When the recording is finished, the system control unit 1 is notified whether the recording operation ended normally or ended with an error, and if the recording operation ended with an error, the operation that ended with the error is also notified.

After outputting the data recording command, the system control unit 1 waits until it is notified from the magneto-optical disk drive 6 that data recording has been completed (decision 20).
8), if the result of judgment 208 becomes YES, it is checked whether an error termination was notified at that time (judgment 209).

When the result of the judgment 209 is YES, the system control unit 1 instructs the magneto-optical disk drive device 6 to re-record (process 210). As a result, the magneto-optical disk drive device 6 seeks again the recording sector specified by the immediately previous data recording command, and records the stored recording data in the target sector again in the two-pass recording mode. When the re-recording is finished, the system control unit 1 is notified whether the re-recording operation has ended normally or with an error, and if it has ended with an error, the operation that ended with the error is also notified. do.

After instructing re-recording, the system control unit 1 waits until it is notified of the end of re-recording from the magneto-optical disk drive device 6 (NO loop of judgment 211), and if the result of judgment 211 is YES. When this happens, it is checked whether the process has ended with an error (decision 212), and the result of determination 212 is NO.
When this happens, the re-recording operation has completed normally, so the system control unit 1 instructs the magneto-optical disk drive 6 to
A command is given to read the recorded data (process 213).

Thereby, the magneto-optical disk drive device 6 reads out the data re-recorded at that time from the target sector and outputs it to the system control section 1. The system control unit 1 compares the input playback data with the recording data output to the magneto-optical disk drive device 6 (processing 214),
Check whether they match (decision 215).

If they do not match and the result of judgment 215 is NO, the target sector specified at that time is registered as a defective sector (process 216), and replacement sector processing is executed to replace the defective sector. The recorded data is recorded in the alternative sector of the alternative sector area (processing 217).

[0040] Then, when recording of data for one file is completed, the system data is updated (process 218), and the data recording process for one sector is ended.

Furthermore, when the first recording operation ends normally and the result of judgment 209 is NO, processing 2
The process moves to step 18 and the subsequent processing is performed. Further, when the result of determination 215 is YES, the process proceeds to process 218 without performing the sector replacement process, and the subsequent processes are performed.

On the other hand, when the result of the determination 201 is NO, a recording operation using the following three-pass recording mode is performed.

That is, first, it is checked whether the target sector specified by the host device is registered as a defective sector (determination 219). The result of judgment 219 is NO.
If so, the target sector designated by the host device is set as the recording sector (process 220), and judgment 21 is performed.
When the result of step 9 is YES, an alternative sector corresponding to the target sector is searched for and the alternative sector is set as a recording sector (process 221).

Further, the print data transferred from the host device is set as print data (process 222), and the 3-pass print mode is set as the print operation mode (process 2).
23), outputs a data recording command to the magneto-optical disk drive device 6 (processing 224).

As a result, the magneto-optical disk drive device 6 seeks the recording sector designated by the data recording command, and records the recording data transferred with the data recording command.
Record in the target sector in 3-pass recording mode. When the recording is finished, the system control unit 1 is notified whether the recording operation ended normally or ended with an error, and if the recording operation ended with an error, the operation that ended with the error is also notified.

After outputting the data recording command, the system control unit 1 waits until it is notified from the magneto-optical disk drive 6 that data recording has been completed (decision 22).
If the result of judgment 225 is YES, it is checked whether an error termination was notified at that time (decision 226).

When the result of judgment 226 is YES, it is checked whether the error end operation notified at that time is a verification operation (judgment 227), and when the result of judgment 227 is YES, then The sector specified as a recording sector is registered as a defective sector (processing 228).
), a replacement sector process is executed to record the data recorded in the defective sector in the replacement sector of the replacement sector area (process 229), and the process moves to process 218. Also, judgment 226
When the result is NO, the recording operation has ended normally, and the process moves to step 218.

Further, when the result of judgment 227 is NO, when the result of judgment 113 is YES, it means that an error that cannot be recovered has occurred in the magneto-optical disk drive device 6, so the process shifts to an abnormal termination state. .

In this way, when recording data, if the magneto-optical disk 7 that is set has been initialized for full-scale writing, the recording operation is performed in the two-pass recording mode. Data recording time can be reduced to almost 2/3 of the time in 3-pass recording mode,
Data recording time can be significantly reduced.

[0050] Also, the set magneto-optical disk 7
However, if the disc is not initialized for full-scale writing, the recording operation is performed in the same 3-pass recording mode as in the past, and even for magneto-optical discs initialized with a device different from that of this example. , so that data can be recorded appropriately.

Furthermore, if some kind of failure occurs in the magneto-optical disk drive device 6 during the two-pass recording mode and the recording operation ends with an error, the same data is re-recorded in the same sector and a verification operation is performed. Therefore, it is possible to avoid a situation where data recording becomes unstable when such a failure occurs, and the reliability of data recording can be improved.

When data is recorded in the two-pass recording mode, for example, if dust or the like adheres to the magneto-optical disk 7, data errors on the magneto-optical disk 7 may increase; however, in recent years, magneto-optical Since the dust-proofing measures for the disk drive device are effective and no dust adheres to the optical disk 7, there is no practical problem at all.

FIG. 6 shows an example of sector replacement processing.

First, the system control unit 1 finds an alternative sector to replace the detected defective sector in the alternative sector area, sets the alternative sector as a recording sector (process 301), and records data transferred from the host device. The data is set as recording data (processing 302), and the 3-pass recording mode is set as the recording operation mode (processing 303).
, outputs a data recording command to the magneto-optical disk drive device 6 (process 304).

[0055] Thereby, the magneto-optical disk drive device 6 seeks the recording sector specified by the data recording command, and records the recording data transferred with the data recording command.
Record in the target sector in 3-pass recording mode. When the recording is finished, the system control unit 1 is notified whether the recording operation ended normally or ended with an error, and if the recording operation ended with an error, the operation that ended with the error is also notified.

After outputting the data recording command, the system control unit 1 waits until it is notified from the magneto-optical disk drive 6 that data recording has been completed (decision 30).
5), if the result of judgment 305 is YES, it is checked whether an error termination was notified at that time (judgment 306).

When the result of judgment 306 is YES, it is checked whether the error end operation notified at that time is a verification operation (judgment 307), and when the result of judgment 307 is YES, then The sector specified as a recording sector is registered as a defective sector (process 308).
), executes replacement sector processing (recursive execution), records the data recorded in the defective sector (replacement sector) in the replacement sector of the replacement sector area (process 309), and normally ends this sector replacement processing.

Further, when the result of the judgment 306 is NO, this means that data recording to the alternative sector has been normally completed, so this sector replacement process is normally completed.

Further, when the result of the judgment 307 is YES, it means that an error that cannot be recovered has occurred in the magneto-optical disk drive device 6, and therefore the process shifts to an abnormal termination state.

[0060] In this way, the recorded data in the defective sector is replaced with a non-defective alternative sector.

Note that this sector replacement process is well known, and other methods may also be used.

By the way, the present invention is not limited to the magneto-optical disk device as in the above-described embodiment, but can be similarly applied to a phase change type optical disk device. In that case, instead of the three-pass printing mode and the two-pass printing mode in the above description, a two-pass printing mode and a one-pass printing mode without an erasing operation can be used.

[0063]

[Effects of the Invention] As explained above, according to the present invention,
All defective sectors are extracted when initializing the recording medium, so even if you use 2-pass recording mode when recording data,
The effects of defective sectors can be eliminated. Further, when a device error occurs during a recording operation, a verification operation is performed on the sector data being recorded, so that the reliability of data recording can be improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a magneto-optical disk device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of how a recording area of a magneto-optical disk is divided.

FIG. 3 is a flowchart showing an example of initialization processing.

FIG. 4 is a flowchart showing part of an example of one sector data recording process.

FIG. 5 is a flowchart showing the remaining part of the example of one sector data recording process.

FIG. 6 is a flowchart showing an example of sector replacement processing.

[Explanation of symbols]

1 System control section 3 Buffer control section 4 Data buffer 6 Magneto-optical disk drive 7 Magneto-optical disk

Claims (2)

[Claims] Claim 1: Using a recording medium capable of recording/erasing/reproducing data, and having a sector replacement processing function for replacing a defective sector that causes a data error with another sector,
When recording data, there are three operations: erasing data in the recording sector, recording data, and verifying the recorded data.
A method for controlling an optical disc device that allows selection of either a 3-pass recording mode in which operations are performed continuously, or a 2-pass recording mode in which two operations, ie, a data erasing operation of a recording sector and a recording operation of recording data, are performed consecutively. When initializing a recording medium, initialization data is recorded in all sectors in 3-pass operation mode, and information on defective sectors discovered at that time and that verification operations have been performed on the entire recording area are recorded on the recording medium. On the other hand, when recording data, if the recording medium records that a verification operation has been performed on the entire recording area, a sector replacement operation is performed based on the information on the defective sector, and a two-pass operation is performed on each sector. A method for controlling an optical disc device, characterized in that data is recorded in a mode. 2. Using a recording medium capable of recording/erasing/reproducing data, and having a sector replacement processing function for replacing a defective sector that causes a data error with another sector,
When recording data, there are three operations: erasing data in the recording sector, recording data, and verifying the recorded data.
A method for controlling an optical disc device that allows selection of either a 3-pass recording mode in which operations are performed continuously, or a 2-pass recording mode in which two operations, ie, a data erasing operation of a recording sector and a recording operation of recording data, are performed consecutively. When initializing a recording medium, initialization data is recorded in all sectors in 3-pass operation mode, and information on defective sectors discovered at that time and that verification operations have been performed on the entire recording area are recorded on the recording medium. On the other hand, when recording data, if the recording medium records that a verification operation has been performed on the entire recording area, a sector replacement operation is performed based on the information on the defective sector, and a two-pass operation is performed on each sector. If a device error occurs during data recording, the data recorded at that time is verified, and if a data error is detected, the sector where the data error was detected is designated as a defective sector. 1. A control method for an optical disc device, characterized in that a sector is recorded as a sector and a sector alteration process is applied to the sector.