JPH0312759A - Automatic data restoration system - Google Patents

Abstract

PURPOSE:To maintain an unmanned operation by holding an abnormal state in a latch relay if the data stored in a semiconductor memory could not be held due to the shortage of capacity of a battery power supply and automatically restoring the saved stored data to the memory when an operation is restarted. CONSTITUTION:A latch relay 31 holds mechanically an abnormal state when the data stored in a semiconductor memory 2 could not be held due to the shortage of capacity of a battery power supply 4 or the cut of an output breaker 6 of the power supply 4. Furthermore the relay 31 is checked when an operation is restarted. If the relay 31 is set, the stored data is automatically restored to the memory 2 from an auxiliary disk 5 where the data is saved. Thus the operation can be restarted in the hitherto operation state with no intervention of a manual operation even if the data stored in the memory 2 could not be held. As a result, an unmanned operation is maintained in a computer system.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to restoring data stored in a file device using a semiconductor memory in a computer system, and particularly relates to a method capable of restoring data without human intervention.

(Prior Art) The conventional method for restoring stored data is used when a semiconductor device data error occurs during self-diagnosis due to insufficient battery capacity of the device concerned.

Just in case you are manually restoring from the auxiliary disk.

(Problem to be Solved by the Invention) The conventional data restoration method described above
This function can be achieved by one person by knowing the power-off period in advance, but this method has the disadvantage that the start-up time of the device is delayed, making the operation cumbersome.

The purpose of the present invention is to solve the problem when the battery power supply has insufficient capacity.
r. When the data stored in the semiconductor memory can no longer be retained due to cutting off the breaker of the battery power supply, the latch relay is used to mechanically maintain the abnormal state, and the latch relay is checked when the device resumes operation. To provide an automatic data restoration method configured to eliminate the above drawbacks and simplify operations by automatically restoring stored data to a semiconductor memory from an auxiliary disk where it has been saved if set. be.

(Means for Solving the Problems) The automatic data restoration method according to the present invention is configured to include a semiconductor memory, a battery power source, an auxiliary disk, an output breaker, and a memory control section.

The semiconductor memory is for storing data, and the battery power source is for holding the data stored in the semiconductor memory while the DC power is turned off.

The auxiliary disk is for saving data stored in the semiconductor memory when the DO power is turned off.

The output breaker is the D from the battery power supply to the semiconductor memory.
This is for turning on/off the C ratio output.

Memory I! The III control section maintains a state where the battery capacity is insufficient due to over-discharge of the battery power supply.

This is to detect that the contents of the semiconductor memory cannot be guaranteed when the DC power is turned on next time, and to automatically restore the stored data from the auxiliary disk.

(Example) Next, one embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an automatic data restoration method according to the present invention. In FIG. 1, 1 is a file device, and 2 is a semiconductor memory.

3 is a memory control unit, 31 is a latte relay, 4 is a battery power source, and 5 is an auxiliary disk.

In FIG. 1, the memory control unit 3 is for storing the latch relay 31, the battery power source 4 is for holding the data stored in the semiconductor memory 2 while the DO power is turned off, and the auxiliary disk 5 is for storing the data stored in the semiconductor memory 2. It is used to save data stored in the semiconductor memory 2 when the DO power supply is cut off, and the output breaker 6 is used to turn on and off the DC output of the battery power supply 4.

FIG. 2 is a flowchart showing the operation when the DC power is turned on in FIG.

In step 201, a self-diagnosis of the memory control unit 3, the memory 2, and the semiconductor memory 2 is performed. In step 202, the latch relay 31 is checked, and if it is not set, no processing is performed. Here, the factors that cause the latch relay 31 to be set are illustrated.

That is, when the latch relay 31 is set to IK, it means that the capacity is reduced due to over-discharge of the battery power source 4, and when the latch relay 31 is set to 2, the stored data is retained by disconnecting the output breaker 6 of the battery power source 4. means stop.

When the latch relay 31 is set, the data saved in the auxiliary disk 5 is restored to the semiconductor memory 2 in step 203.

Further, in step 204, the latch relay 31 is reset.

(Effects of the Invention) As explained above, the present invention enables the latch relay to be used when the battery power supply becomes insufficient in capacity or when the output breaker of the battery power supply is disconnected and the data stored in the semiconductor memory cannot be retained. Mechanically maintain the abnormal state,
Furthermore, check the latch relay when restarting the equipment,
If set, the stored data is automatically restored to the semiconductor memory from the saved auxiliary disk. Therefore, even if the stored data in the semiconductor memory cannot be retained, it can be restored to the state before the operation was stopped without human intervention. Resuming operation will have the effect of allowing Kirno to maintain unmanned operation of its computer system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an automatic data restoration method according to the present invention. FIG. 2 is a flowchart showing the operation when the DO power is turned on in FIG. 1...File device 2...Semiconductor memory 3...
・Memory control unit 4...Battery power supply 5...Auxiliary disk 31...Latch relay

Claims (1)

[Claims] a semiconductor memory for storing data; a battery power supply for retaining the data stored in the semiconductor memory while the DC power is turned off; and a battery power supply for saving the data stored in the semiconductor memory when the DC power is turned off. an auxiliary disk, an output breaker for turning on/off the DC output from the battery power supply to the semiconductor memory, and an output breaker for maintaining the insufficient battery capacity state caused by overdischarge of the battery power supply, and An automatic data restoration system comprising: a memory control unit for detecting that the contents of the semiconductor memory cannot be guaranteed and automatically restoring stored data from the auxiliary disk.