JPH02297770A - Optical disk device - Google Patents

Abstract

PURPOSE:To prevent the destruction of a medium logical structure at occurrence of a fault of an optical disk device and at the same time to improve the reliability of the disk device by adding a battery back-up memory into the optical disk device. CONSTITUTION:A battery back-up memory 3 stores temporarily the medium fault information including the write data that could not be normally written owing to a sector address fault showing a writing fault area of a medium of an optical disk drive 2 at occurrence of a data writing fault incapable of a substitute sector process. An optical disk control part 1 reads the medium fault information out of the memory 3 after restoration of the fault of an optical disk device and writes the fault information again into a sector where the fault occurred or into a substitute sector. Thus it is possible to prevent destruction of a medium logical structure at occurrence of a fault of the optical disk device and to improve the reliability of the disk device.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an optical disc device.

[Conventional technology]

In conventional optical disk devices, when a write failure occurs, data is rewritten in another sector using alternative sector processing, but in the case of a failure in the laser system, etc., data is rewritten during the above alternative sector processing. If it turns out to be defective, processing is interrupted at that point.

[Problem to be solved by the invention]

In the conventional optical disk device described above, if a device failure that makes alternative sector processing impossible occurs, processing is interrupted at that point, so when the logical structure of the optical disk medium is being updated, the updated data may be the last one. This has the disadvantage that the logical structure of the medium is destroyed and the medium cannot be reused. Another drawback is that the above phenomenon occurs even when the power is cut off while the device is in operation.

[Means to solve the problem]

The optical disk device of the present invention temporarily stores media failure information including the sector address indicating the write failure location on the medium of the optical disk drive and the write data that could not be written normally due to the failure when a data write failure that cannot be processed in an alternative sector occurs. and an optical disk control unit that reads out the medium failure information stored in the backup memory and rewrites it to the corresponding failure sector or alternative sector after recovery from a device failure. ing.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an optical disc device of the present invention.

The embodiment shown in FIG. 1 includes an optical disc control section 1, an optical disc drive 2, and a battery backup memory 3. FIG. 2 is a flowchart showing the write process of the optical disk device of FIG. 1, and FIG. 3 is a flowchart showing the medium recovery process after the failure of the optical disk drive is recovered.

Next, the operation of the embodiment shown in FIG. 1 will be explained.

The optical disc control unit 1 performs the following steps when writing data in step 1 (reference numeral 11) of the writing process shown in FIG.
When a failure occurs, the process proceeds from step 2 (reference numeral 12) to step 3 (reference numeral 13) to perform alternative processing. Furthermore, if a write failure occurs in the alternative process, steps 4 (reference numeral 14) to step 5 (reference numeral 1) are performed.
Proceeding to step 5), medium failure information including the sector address indicating the write failure location on the medium and the write data that could not be written normally due to the failure is temporarily stored in the battery backup memory 3. After that, optical disk drive 2
When recovering and re-accessing this medium, the third
Execute the media recovery process shown in the figure. In step 6 (reference numeral 16), the medium failure information in the battery backup memory 3 is read, and in the next step 7 (reference numeral 17)
After rewriting to the relevant faulty sector or alternative sector in step 8, data access is performed in step 8 (reference numeral 18), thereby making it possible to recover the medium from the fault.

〔Effect of the invention〕

As described above, the optical disk device of the present invention has the effect of preventing destruction of the medium logical structure in the event of a device failure and increasing the reliability of the device by incorporating a battery backup memory.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the optical disk device of the present invention, FIG. 2 is a flowchart of the write process in the embodiment of FIG. 1, and FIG. 3 is a failure recovery of the optical disk drive of the embodiment of FIG. 1. 7 is a flowchart of subsequent media recovery processing. 1... Optical disc control unit, 2... Optical disc drive, 3... Battery backup memory. agent patent attorney uchi hara syllable 1 eup

Claims (1)

[Claims] Battery backup for temporarily storing media failure information, including the sector address indicating the location of the write failure on the optical disk drive medium and the write data that could not be written normally due to the failure, when a data write failure occurs that cannot be processed by alternative sectors. An optical disk device comprising: an optical disk control unit having a memory, and reading out the medium failure information stored in the backup memory and rewriting it to the corresponding failure sector or alternative sector after recovery from the device failure. .