JPH0417021A - Substitute operating system for faulty magnetic disk device - Google Patents

Abstract

PURPOSE:To minimize a delay in customer service job by a temporary break of the job by continuing the job by restoring a file in another usable file area before restoring hardware. CONSTITUTION:A means 11 which judges whether or not a substitute file can be produced after recognizing the content and extent of a magnetic disk fault and whether or not substitute operation can be done with the substitute file is provided. In addition, another means 12 which secures a file restoring area from the information of a file to be restored and the empty information of the same medium and another medium and restores the file in the area is also provided. Therefore, it becomes unnecessary to temporary stop a customer service job which uses the data stored in a faulty area and the job can be restarted quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an alternative operation system when a magnetic disk device fails.

[Conventional technology]

Conventionally, when a failure occurs in a magnetic disk device, hardware maintenance personnel first performs hardware repairs, and then a customer or system engineer performs file recovery.

[Problem to be solved by the invention]

With the conventional magnetic disk recovery methods mentioned above, it was necessary to treat the failed location as unusable, so customer operations using data stored in the failed location were temporarily suspended until file recovery was completed. Because it is necessary,
The drawback is that there is a delay in resuming customer business processing.

[Means to solve the problem]

The alternative operation system for a magnetic disk device of the present invention includes means for determining whether an alternative file can be created after understanding the content and extent of a magnetic disk failure, and determining whether alternative operation is possible using that file, and a means for determining whether an alternative operation is possible using the file. The system is configured to include means for securing a file recovery area based on file information and free space information on the same medium or a different medium, and restoring the file to that area.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a flow diagram illustrating one embodiment of the present invention.

Obtain the error information 21 that O8 automatically collects when a magnetic disk failure occurs, and determine the details of the failure.

The extent of the recovery and the files to be recovered are determined (Step 1).

Next, the extent of the influence of the failure is determined, and it is determined from the backup magnetic tape information 22 whether the file can be recovered (
Step 2).

With this, the operation of the alternative operation enable/disable means 11 is completed.

Furthermore, file management information 23 of the file to be recovered,
An area necessary for file recovery is secured from the alternative track of the same magnetic disk medium and the free space information 24 of another medium. At this time, file management information is also updated.

(Step 3).

Furthermore, a job for restoring the file is automatically started from the restoration job information 26 for each file, and the file is restored from the backup magnetic tape 25 (step 4).
).

In this way, the operation of the file recovery means 12 is completed.

〔Effect of the invention〕

As explained above, the present invention can restore files to another usable file area before hardware recovery and allow business to continue. This has the effect of minimizing delays.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the configuration of an embodiment of the present invention. 1]... Means for determining whether alternative operation is possible, 12... File recovery means, 21... Magnetic disk error information, 2
2...Backup magnetic tape information, 23...File management information, 24...Alternative track of the same medium and free space information of another medium, 25...Backup magnetic tape,
26...File recovery job information.

Claims (1)

[Claims] A method for determining whether alternative operation is possible by understanding the details of the failure and creating an alternative file when a magnetic disk device fails, and creating an alternative file in the free space of the magnetic disk and restoring the file from the backup magnetic tape. An alternative operation system in the event of a magnetic disk device failure, characterized by comprising a file recovery means.