JPH0322018A - Fixed disk storage device - Google Patents

Abstract

PURPOSE:To repair data on a main fixed disk by newest data by providing a storage part to store the change history of data in the main fixed disk and a controller to execute the backup of the data by referring the contents of the storage part in a fixed disk controller part. CONSTITUTION:When the data are written to a main fixed disk 1, a main fixed disk controller 3 registers the contents of the change to a change history storing part 4. A fixed disk controller 5 for backup receives the data repair instruction of the main fixed disk controller 3 and repairs the main fixed disk 1 by using the data of a fixed disk 2 for backup. When a system is shut down or a backup request is given from a main CPU 10, the contents of the change history storing part 4 are referred and only a changed file or a physical class is transferred from the main fixed disk 1 to the fixed disk 2 for backup, then, the backup is executed. Thus, the backup can be executed by the newest data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to fixed disk storage devices. [Prior Art] A main fixed disk that performs storage processing, a change history storage section that stores changes when the contents of the main fixed disk are changed, and a change history storage section that stores the changes when data restoration instructions are received. The apparatus includes a backup media controller that refers to the contents stored in the history storage section, restores the contents of the main fixed disk, and stores the restored contents in a predetermined storage medium. [Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a first embodiment of the present invention.

This embodiment includes a main fixed disk 1, a backup fixed disk 2, a main fixed disk controller 3 that controls access from the main CPUIO to the main fixed disk 1 and traces the change history of the main fixed disk, and a change record that records the change history. History storage unit 4, from main fixed disk 1 to backup fixed disk 2,
It consists of a backup fixed disk controller 5 that transfers changed files or physical clusters. Note that the main fixed disk controller 3, change history storage section 4, and backup fixed disk controller 5 form a fixed disk controller section 6.

In this embodiment, the main fixed disk controller 3 receives a request for fixed disk access from the main CPtJ 10, and performs normal writing and reading on the main fixed disk 1. When the main fixed disk controller 3 writes to the main fixed disk 1, it registers the changed contents in the change history storage section 4.

When data corruption occurs on the main fixed disk 1, it instructs the backup fixed disk controller 5 to repair the damaged part, issues a warning to the main CPUIO, and minimizes the effects of data corruption. The backup fixed disk controller 5 receives a data restoration instruction from the main fixed disk controller 3 and repairs the main fixed disk 1 using the data on the backup fixed disk 2. Furthermore, when the system is shut down or when a backup request is received from the main CPUIO, the backup fixed disk controller 5 refers to the contents of the change history storage section 4 and saves only the changed files or physical clusters to the main CPUIO. The data is transferred from the fixed disk 1 to the backup fixed disk 2 for backup.

Each of the above functions ensures that the latest stored data is always backed up. FIG. 2 is a block diagram of a second embodiment of the invention.

This embodiment includes a main fixed disk 1, external backup storage media 2OA, 20a, a main fixed disk controller 3 that controls reading and writing of the main fixed disk 1 and traces the history of write changes, a change history storage section 4, and a data backup. The external backup media controller 7 performs backup while referring to the change history.

In this embodiment, the main fixed disk controller 3 performs main fixed disk access control from the main CPU 10 and registers the history of main fixed disk content changes.
The backup media controller 7 refers to the change history and backs up the contents of the main fixed disk 1 to the external backup recording media 20^, 20B.

In this embodiment, since the backup medium is external, multiple external backups can be taken, and in addition to the latest data backup function, there is an advantage that long-term data storage of old data is also possible.

〔Effect of the invention〕

As explained above, the present invention has a structure in which the fixed disk controller section has a storage section that stores the change history of data on the main fixed disk, and a controller that backs up the data by referring to the contents of this storage section. By doing so, the latest data can always be saved on the backup storage medium, and the data on the main fixed disk can be restored with the latest data.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention;
The figure is a block diagram showing a second embodiment of the present invention.

Claims (1)

[Claims] a main fixed disk for normal data storage;
When there is a change in the contents of this main fixed disk, a change history storage section is used to store the change contents, and when a data restoration instruction is received, the contents stored in the change history storage section are referred to. A fixed disk storage device comprising a backup media controller for restoring the contents of a main fixed disk and storing the restored contents on a predetermined storage medium.