JPH03232012A - Disk device with backup mechanism - Google Patents

Abstract

PURPOSE:To perform backup with a disk device alone by prohibiting the acceptance of a command from a host device with an interface part when both a disk part and a backup part can be used, and storing data in the backup part by reading it out from the disk part. CONSTITUTION:When a button 10 is depressed, the fact of depression is informed to a backup control part 30 via a signal bus 100. The backup control part 30 informs the prohibition of the acceptance of the command from the the host device to the interface part 20 via the signal bus 100 when the disk part 50 can be used. After that, the backup control part 30 issues a write command to the backup part 40 via the signal bus 100 when the backup part 40 can be used, and transfers the data in a buffer via a data bus 200, and writes the data. In such a way, the backup can be performed with the disk device alone.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk device used in an information processing device.

[Conventional technology]

Conventionally, this type of disk device did not have a mechanism for backing up the device itself (saving the contents of the disk device to another external storage device), and in order to back up the disk device, the system A backup device (an external storage device other than a disk device) was attached to the computer, and software was used to transfer the contents of the disk to the backup device for backup. Unfortunately, if a user wanted to back up the system during operation, only the backup software could run to avoid changing the contents of the disk.

[Problem to be solved by the invention]

The above-mentioned conventional disk device has the disadvantage that it cannot perform backup by itself because the device itself is not equipped with a mechanism for performing backup. Furthermore, in order to perform backup, a backup device is connected to the host device and backup is performed using software, so there is a drawback that software for performing backup must be created.

Further, when a user performs backup, only software for backup can be operated, so there is a drawback that the host device cannot be used during operation.

[Means to solve the problem]

A disk device with a backup mechanism according to the present invention includes a disk unit that is an external storage device of a host device, a backup unit that backs up this disk unit, an interface unit that communicates with the host device, and a device that receives a backup command. and a backup control unit that reads data from the disk unit and stores it in the backup unit while preventing the interface unit from accepting commands from the host device when the disk unit and the backup unit are available. Consists of.

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

FIG. 1 is a block diagram showing one embodiment of the present invention. The button 10 is used by maintenance personnel to select a backup operation, and is connected to the backup control unit 30 via a signal bus 100. The interface unit 20 is for sending and receiving commands and data from the host device and for not accepting commands and data during the backup operation, and is connected to the backup control unit 30 via a signal bus 100, and is connected to the disk unit 50 and a data bus 200. connected with.

When the button 10 is pressed, the backup control unit 30 reads data from the disk unit 50 and stores the data in the backup unit 4.
It is connected to the disk unit 50 by a signal bus 100 and a data bus 200 at a point where operations such as writing data to 0 are controlled, and is also connected to the backup unit 40 by a signal bus 100 and a data bus 200. The backup section 40 is where the contents of the disk section 50 are saved. The disk unit 50 is an external storage device of the host device.

Next, the operation of this embodiment will be explained.

When the button 10 is not pressed, data and commands from the host device are notified to the disk unit 50 through the data bus 200, and the disk unit 50 reads or writes data according to the notified commands.

Next, a case where the button 10 is pressed will be explained.

When the button 10 is pressed, the backup control unit 30 is notified via the signal bus 100.

The backup control unit 30 determines whether the disk unit 50 is usable through the signal bus 100, and if it is usable, notifies the interface unit 20 through the signal bus 100 not to accept commands from the host device. At this time, when the interface section 20 receives a command from the host device, it notifies the host that the disk section 50 is in use (if the disk section 50 is not available, it cancels the pressing of the button 10). , then do nothing).

After that, the backup control unit 30 controls the backup unit 4
0 is available or not via the signal bus 100. If the storage medium is unusable (the storage medium is not installed, the backup unit 40 is in operation, and the storage medium is in a write-protected state),
The fact that the button 10 has been pressed is canceled and the interface section 20 is notified through the signal bus 100, making it possible to receive commands from the host device. If it is usable, the button 10 is notified through the signal bus 100 that a backup operation will be performed, the button 10 is locked so that it is not pressed, and the LED indicating that the backup operation is in progress is lit.

Then, the backup control section 30 issues a disk read command to the disk section 50 via the signal bus 100, and stores the command in a buffer within the backup control section 30 via the data bus 200. Further, the backup control unit 30 issues a write command to the backup unit 40 through the signal bus 100, transfers the data in the buffer through the data bus 200, and writes the data. This operation of reading data from the disk section 50 and writing it to the backup section 40 is repeated until all the contents of the disk section 50 are written.

When all the contents of the disk have been written, the backup control unit 30 notifies the interface unit 20 through the signal bus 100 that the backup operation has been completed, and enables commands from the host device to be accepted. It also notifies the button 10 through the signal bus 100 that the backup operation has ended, releases the button from being locked, and turns off the ED, which was indicating that the backup operation is in progress. Further, when the operation is completed, a command is issued to the backup unit 40 via the signal bus 100 to return the storage medium to the initial position, and when the operation is completed, the backup operation is ended.

Note that in addition to the button 10, a device that generates various signals such as a timer may be used to select the backup operation. Further, data in the disk unit 50 may be backed up to the backup unit 40 when a specific command is received from the host device.

〔Effect of the invention〕

As described above, the present invention has the advantage that backup can be performed by the disk device alone by generating a backup command, such as by pressing a button for performing a backup operation. Furthermore, since the backup operation is performed independently by the device by pressing a button or the like, there is an effect that the backup operation can be performed without creating software for performing the backup. Furthermore, since the interface section does not accept commands or data from the host device during backup operation, it can be used during operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. 10... Button, 20... Interface section, 30
... Backup control section, 40... Backup section, 50... Disk section, 100... Signal bus, 20
0...O

Claims (2)

[Claims] (1) A disk unit which is an external storage device of the host device,
A backup section that backs up this disk section,
An interface section that communicates with the host device, and if the disk section and the backup section are available when a backup command is received, the interface section prevents commands from the host device from being sent to the disk. 1. A disk device with a backup mechanism, comprising: a backup control section that reads data from the backup section and stores the data in the backup section. (2) a disk unit which is an external storage device of the host device;
A backup section that backs up this disk section,
An interface section for communicating with the host device, a button for instructing backup, and if the disk section and the backup section are available when this button is pressed, the interface section receives commands from the host device. A disk device with a backup mechanism, comprising: a backup control section that reads data from the disk section so as not to accept the data, and stores the data in the backup section.