JPS6357818B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disk file backup method that can automatically back up files that have an area on a disk and need to be backed up.

Conventionally, when backing up files on a disk, an operator specified the file name and copied (backed up) one file at a time to an FDD (floppy disk device) or CMT (cassette magnetic tape). Therefore, when backing up multiple files, one
The disadvantages are that the operation is cumbersome because files are copied one by one, and it takes a very long time to create a backup diskette. Furthermore, when a large number of files are to be backed up, the floppy disk or CMT must be set up many times, placing a heavy burden on the operator.

This invention was made in view of the above points,
The purpose is to provide a disk file backup method that can automatically back up files on a disk that need to be backed up.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 schematically shows an electronic computer system having a plurality of workstations. In the figure, 11 is the host station
HS, multiple disks (DISK #o to #m) 12o
~12m is connected. In addition, multiple workstations (WS#o) ~ (WS#n) 13o ~ 13n
From there, signal lines are connected to the host stations, respectively.

FIG. 2 is a partially detailed diagram of the electronic computer system shown in FIG. In the figure, power signals output from work stations WS#o to WS#n to turn on the power to the host station are inverted and input to an AND circuit 21, and are also input to a relay 23 via diodes 22o to 22n. Also, the Q of the R-S type flip-flop 24 is
The output is input to the relay 23 via the diode 25. This relay 23 controls the opening and closing of the main switch S of the host station 11. Thus, the output signal of the AND circuit 21 is input to the C terminal of the D-type flip-flop 22. The D terminal of this flip-flop 22 has a power supply.
V _DD (high level) is input. The Q output of this flip-flop 22 is output to a vector address generator 23. This vector address generator 23 outputs the start address of the backup processing program mode module stored in area A of the main memory shown in FIG.

Next, the operation of the present invention configured as described above will be explained. Now, for example, workstation WS
When #o13o is powered on, a power-on signal is sent to relay 23 via diode 22o. As a result, the relay 23 operates, the main switch S of the host station 11 closes, and the host station 11 becomes operable. next,
Through processing within the host station 11, a power-on signal of the host station 11 is output as a set signal to the flip-flop 24, and the flip-flop 24 is set. Thereafter, the job sent from the work station WS#o13o is processed by the host station 11. A specific flag is attached to the files 31a to 31c that need to be backed up on the disk 31 of the host station 11 by the job, but the backup processing is performed after the power to all workstations is turned off. It will be done. In this example, workstation WS#o
Although we have described the case where the host station 11 processes jobs from the host station 13o, it goes without saying that jobs may also be submitted from other work stations. Then, when all processing at the workstation where the job was being performed is completed and all power supplies of the workstation are turned off, the AND circuit 21 outputs a high level signal. Therefore, the Q output of the flip-flop 22 becomes high level, and the vector address generator 23 outputs the main memory 3 of the host station 11.
The start address of area A of No. 3 is specified. below,
The backup processing program load module stored in area A of the main memory 33 is activated, and the backup processing program stored in area C of the disk 31 is loaded into area B of the main memory 33.
loaded into. Thereafter, this backup processing program is started, searches for files to which a specific flag is attached among the files in the disk 31, and backs up necessary files 31a to 31c.
The data is transferred to the area 32a of the backup disk 32, and the process ends. When this backup processing program is completed, a reset signal is output to the flip-flop 24. Therefore, the Q output of the flip-flop 24 becomes low level, the driving of the relay 23 is stopped, and the main switch S of the host station 11 is opened.

As detailed above, according to the present invention, the files that need to be backed up on the disk are automatically backed up after all the power to the workstation is turned off, and the power to the host station is turned off after the backup process is completed. Therefore, there is no need for operator operations for backup processing, and time can be saved.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention.
2 is a diagram schematically showing an electronic computer system having a plurality of work stations, FIG. 2 is a partially detailed diagram of the electronic computer system of FIG. 1, and FIG. 3 is a diagram showing a part of a host station. 11...Host station, 13o-13n...
Workstation, 22, 24...flip-flop, 23...vector address generator.

Claims (1)

[Claims] 1. In a computer system equipped with a plurality of workstations, a means for detecting whether the power to all workstations has been turned off, and when it is detected by this means that the power to all workstations has been turned off, the information on the disk 1. A disk file backup method, comprising: a means for transferring a file to be backed up to another external storage device for backup; and a power supply to a host station is turned off after the backup process is completed.