JPH03278152A - Electronic disk device - Google Patents

Abstract

PURPOSE:To reduce the consumption of a battery by executing a save operation from a second electronic disk to a save magnetic disk when a fault occurs in a first electronic disk. CONSTITUTION:At the time of power-off, in a regular save operation, data is saved in a magnetic disk 60 from a first electronic disk 40, and a second electronic disk 50 does not execute the save operation but becomes a power save state, but when a fault is generated in a first electronic disk 40, data is saved from a second electronic disk 50 to the magnetic disk 60. In such a way, when the consumption of a battery by saving to the magnetic disk 60 and the consumption of a battery in a power save state of a second electronic disk 50 are taken into consideration, the consumption of the battery can be reduced.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electronic disk device.

[Conventional technology]

In conventional electronic disk devices, the battery backup function of the electronic disk when the power is turned off is limited to a time period for saving on the magnetic disk, and each electronic disk has a magnetic disk for saving.

[Problem to be solved by the invention]

The above-mentioned conventional electronic disk device has the disadvantage that battery consumption is large because data is saved from each electronic disk to a corresponding magnetic disk at the time of power-off saving.

[Means to solve the problem]

An electronic disk device of the present invention includes a first electronic disk;
a second electronic disk for writing the same data as the first electronic disk; a save magnetic disk; a battery; the first electronic disk, the second electronic disk, and the save magnetic disk. means for backing up the data by the battery; means for cross-calling the first electronic disk and the second electronic disk by the save magnetic disk; The second electronic disk does not save to the save magnetic disk and enters a power save state using the battery, but if a failure occurs in the first electronic disk, the second electronic disk does not save to the save magnetic disk. The present invention is characterized by comprising means for saving from the second electronic disk to the save magnetic disk.

〔Example〕

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

FIG. 1 is a diagram showing an embodiment of the present invention.

In FIG. 1, an electronic disk control device 10 is connected to a first electronic disk 40 and a second electronic disk 50 via input/output signal lines a and b.

The magnetic disk 60 is connected to the first electronic disk 40 and the second electronic disk 50 via input/output signal lines c and d. First electronic disk 40. Second electronic disk 50. The magnetic disks 60 are connected to each other via power supply lines e+f+g.

The electronic disk 20 is powered by a battery 30. First electronic disk 40. It is composed of a second electronic disk 50 and a battery 60.

Next, the operation of this embodiment will be explained. When the power is off,
In a normal save operation, data is saved from the first electronic disk 40 to the magnetic disk 60, and the second electronic disk 50 does not save and enters a power save state, but if the first electronic disk 40 has a failure. When it occurs, the second
Data is saved from the electronic disk 50 to the magnetic disk 60.

〔Effect of the invention〕

As explained above, in the present invention, a magnetic save disk is cross-call connected to a first electronic disk and a second electronic disk, and when the power is turned off, save is normally performed from the first electronic disk, and from the second electronic disk. The electronic disk is placed in a power save state without being saved. If the first electronic disk fails, the data is saved from the second electronic disk to the magnetic disk. This has the effect of reducing battery consumption, considering the battery consumption when saving to the magnetic disk and the battery consumption when the second electronic disk is in the power save state.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. 10...Electronic disk control device, 20...
...Electronic disk device, 30...Battery, 4
0...First electronic disk, 50...
Second electronic disk, 60...magnetic disk.

Claims (1)

[Claims] a first electronic disk, a second electronic disk for writing the same data as the first electronic disk, a save magnetic disk, a battery, the first electronic disk and the second electronic disk; means for backing up the disk and the save magnetic disk with the battery; means for cross-calling the first electronic disk and the second electronic disk using the save magnetic disk;
At the time of power-off saving, normally the first electronic disk saves to the save magnetic disk, and the second electronic disk does not save to the save magnetic disk and is put into a power save state by the battery.
An electronic disk device comprising means for saving data from the second electronic disk to the saving magnetic disk when a failure occurs in the electronic disk.