JPH05173676A - Disk power source control system - Google Patents

Abstract

PURPOSE:To provide the magnetic disk power source control system which is controlled by a small power unit and superior in economy by performing power source control over disk devices individually and suppressing fed current values small. CONSTITUTION:This disk power source control system is equipped with magnetic disk power sources 10a, 10b, 10c, and 10d which individually control the power ON/OFF states of plural magnetic disk devices 13a, 13b, 13c, and 13d and a magnetic disk power unit control circuit part 8 which controls the power-ON /OFF states of the magnetic disk power sources with stoggering the time. Further, this system has an initial program storage disk number specification switch (IPL disk specification switch) 3 which controls the magnetic disk power unit control circuit part 8 to specify and power ON the disk device where an initial program is stored simultaneously with the power-ON operation of a main body power source, and also power ON other disk devices in order with stoggering the time through the magnetic disk power unit control circuit 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk power supply control system for controlling the power supply of a plurality of disk devices such as magnetic disk devices and magneto-optical disk devices provided in a computer system.

[0002]

2. Description of the Related Art Conventionally, a system shown in FIG. 2 is generally known as a system for controlling the power supply of a disk device. A computer system including four magnetic disk devices will be described as an example.

Reference numerals 33a, 33b, 33c and 33d denote magnetic disk devices, and the magnetic disk devices 33a, 33b and 3 are provided.
3c and 33d are connected to one power supply device 31 via a power supply line 35. Further, the control unit 32 is also the power supply device 3
It is connected to 1. The power supply device 31 is connected to the power switch 34 of the operation panel 30.

Each magnetic disk device 33a, 33b, 33
The power to the c and 33d is turned on by the power switch 34. That is, by turning on the power switch 34, the power supply device 31 is operated and power is supplied to the entire system, and together with the control unit 32, the four magnetic disk devices 33a, 33b,
33c and 33d are simultaneously turned on.

[0005]

By the way, in each of the magnetic disk devices 33a, 33b, 33c and 33d, the power-on current when the power is turned on is generally twice to three times the current value at the normal time. .. This is for one magnetic disk device, and four magnetic disk devices 33a, 33
If the powers of b, 33c, and 33d are turned on at the same time, the turn-on current at the time of turning on the power is doubled to tripled for four units.

Therefore, as shown in FIG. 3A, even if the peak current of each of the magnetic disk devices 33a, 33b, 33c, 33d is small, the four magnetic disk devices 33a, 33b, 33c are small. , 33d start up at the same time, the input currents for four units simultaneously flow, and show large peak values as shown in FIG. 3 (b). Therefore, there is a problem that a very large power supply device 31 is required.

The present invention has been made in view of the above-mentioned problems, and the power supply of the magnetic disk device is individually controlled to suppress the input current to a small value, which is economically advantageous because it can be controlled by a small power supply device. An object is to provide a disk power supply control method.

[0008]

The present invention has been made in view of the above problems, and in a computer system equipped with a plurality of disk devices, a power supply device for individually controlling power-off of each disk device, The power-on control means for controlling the power-off of the power supply device with a time delay, and the disk device storing the initial program by controlling the power-on / off control means are designated to turn on the power of the main body. Another disk device is turned on at the same time, and an initial program storing disk designating means for causing the power-on / off control means to sequentially perform power-on control with a time shift.

[0009]

With the above construction, the initial program storage disk designating means controls the power supply cut-off control means, and the initial program storage disk device is designated prior to the normal control by the power supply cut-off control means. When the power is turned on in this state, the power cut-off control means controls the power supply device to power on the initial program storage disk device, and then the power supply cut-off control device controls the power supply device to give time to other disk devices. The power is sequentially turned on after shifting.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. 1, 4 and 5.

FIG. 1 is a system block diagram showing a disk power supply control system of this embodiment, and FIG. 4 is a block diagram showing a magnetic disk power supply device control circuit section.

In FIG. 1, reference numeral 1 denotes an operation panel, which includes a power switch 2 and an initial program storing disk number specifying switch (hereinafter referred to as "IPL disk specifying switch") 3 as an initial program storing disk specifying means. Is equipped with. The power switch 2 controls ON / OFF of the power of the entire system.

The IPL disk designating switch 3 includes four magnetic disk devices 13a, 13b, 13c, 1 which will be described later.
Among the 3d, the disk device storing the initial program is selected by designating the number of the device, and the number designated by the designating switch 3 is controlled by the magnetic disk power supply device described later via the IPL disk number support line 9. It is output to the circuit unit 8. The initial program includes the program required when the system starts up and the magnetic disk device 1
Of 3a, 13b, 13c, 13d, the order of supplying power to disk devices other than the disk device designated by the IPL disk designation switch 3. The order in which power is supplied to the disk device specified by the IPL disk specification switch 3 and other disk devices differs depending on the usage status of the system and is set appropriately by each user.

The IPL disk number support line 9 is 2 bits, and the IPL disk designation switch 3 has a value of 0-3. When the value is 0, the first magnetic disk device 13a is designated, and when the value is 1, the second magnetic disk device 13b is designated.
Is set to 2, the third magnetic disk device 13c is designated, and when the value is 3, the fourth magnetic disk device 13d is designated.

Reference numeral 4 is a main body control unit power supply, 5 is a control unit, and the main body control unit power supply 4 is connected to the power switch 2 by a main body control unit power supply control line 6 and is also controlled by a main body control unit power supply line 7. 5, the main body control unit power supply 4 is operated by operating the power switch 2, and power is supplied to the control unit 5 via the main body control unit power supply line 7.

The control unit 5 has a magnetic disk power supply device control circuit unit 8 as a power supply cut-off control unit, and also has functions necessary for the system such as a processor, a memory, an input / output control device unit. The control unit 5 controls the magnetic disk devices 13a, 13b, 13c, 13d via the IO bus 12.
And read and write data. 1
0a, 10b, 10c and 10d are magnetic disk devices 1
Magnetic disk power supplies 10a, 10b, 10c, 10d are provided as power supplies for four magnetic disk drives 13a, 13b, 13c, 13d corresponding to 3a, 13b, 13c, 13d. Control the disruption individually. The magnetic disk power supplies 10a, 10
b, 10c, 10d are magnetic disk power supply control lines 14a,
Each of the magnetic disk devices 13 is connected to the magnetic disk power supply device control circuit unit 8 via 14b, 14c, 14d, and controlled by the magnetic disk power supply device control circuit unit 8.
Power is supplied to a, 13b, 13c, and 13d individually and selectively with a time shift. Further, the magnetic disk power supplies 10a, 10b, 10c and 10d are connected to the magnetic disk devices 13a, 13b, 13c and 13d through the respective magnetic disk device power supply lines 11a, 11b, 11c and 11d. The magnetic disk power supplies 10a, 10b, 10 are controlled by the magnetic disk power supply control circuit 8.
c and 10d are sequentially operated, and power is directly supplied to the corresponding magnetic disk devices 13a, 13b, 13c and 13d.

The magnetic disk power supply control circuit 8 is shown in FIG.
It is configured like. In the figure, 21a, 21b, 21c,
21d is a magnetic disk power supply 10a, 10b, 10c, 1
Four magnetic disk power supply control registers are provided corresponding to 0d, and the processor of the control unit 5 selectively selects "0".
Alternatively, when the "1" signal is written and the "1" is written, the corresponding magnetic disk power supplies 10a, 10b, 10
Operate c and 10d. The magnetic disk power supply control registers 21a, 21b, 21c and 21d are all "0" as initial values. 22a, 22b, 22c,
Reference numeral 22d is an OR circuit, and four OR circuits are provided corresponding to each magnetic disk power supply control register 21a, 21b, 21c, 21d, and are connected to each. A decoder circuit 23 is connected to each OR circuit 22a, 22b, 22c, 22d via output lines 24a, 24b, 24c, 24d. The decoder circuit 23 is connected to the IPL disk designating switch 3 of the operation panel 1 through the IPL disk number support line 9, and a signal indicating the initial program storing disk number designated by the switch 3 is input. The output side of each OR circuit 22a, 22b, 22c, 22d has magnetic disk power supply control lines 14a, 14b, 14c,
14d through the magnetic disk power sources 10a, 10b, 1
0c and 10d, respectively, to control the power supply to the magnetic disk devices 13a, 13b, 13c and 13d.

Next, the operation of the disk power supply control system having the above configuration will be described.

The number of the disk device storing the initial program is specified in advance by the IPL disk specification switch 3 on the operation panel 1. In the present embodiment, it is assumed that the first magnetic disk device 13a is designated, and the IP
The value "0" indicating the first magnetic disk device 13a is input to the decoder circuit 23 of the magnetic disk power supply device control circuit unit 8 through the L disk number support line 9.

First, the power switch 2 is turned on to turn on power to the system. When the switch is turned on, the main body control unit power supply 4 is operated and power is supplied to the control unit 5. As a result, the magnetic disk power supply device control circuit unit 8 is operated, and the decoder circuit 23 outputs the "1" signal to the first output line 24a according to the value "0" from the IPL disk designating switch 3. The "1" signal is input to the first OR circuit 22a, and the "1" signal is input from the OR circuit 22a to the first magnetic disk power supply 10a via the first magnetic disk power supply control line 14a. As a result, only the first magnetic disk power supply 10a is operated, power is supplied to the first magnetic disk device 13a, and data can be read. At this point, the other magnetic disk power supplies 10b, 10c, 10d are in a non-operating state, and the magnetic disk devices 13b, 13c,
13d maintains a power-off state.

At this time, the control unit 5 is already in operation,
The initial program is read from the first magnetic disk device 13a. In the control unit 5, "1" is written in each magnetic disk power supply control register 21a, 21b, 21c, 21d according to the data stored in advance in the initial program.

Specifically, it is as follows. First, since the first magnetic disk power supply control register 21a is specified by the IPL disk designating switch 3, the magnetic disk power supply control register 21a is excluded.

Another magnetic disk power supply control register 21
When the b, 21c, and 21d are programmed so that the second, third, and fourth registers 21b, 21c, and 21d are turned on in this order, for example, the second magnetic disk is first read according to the program. "1" is set in the power control register 21b. As a result, the "1" signal becomes the second OR.
The power is supplied to the second magnetic disk power supply 10b via the circuit 22b and the second magnetic disk power supply control line 14b.
0b is operated, power is supplied to the second magnetic disk device 13b, and this disk device 13b is operated. Next, the third and fourth magnetic disk power supply control registers 21c,
"1" is sequentially written in 21d, and the third and fourth magnetic disk devices 13c and 13d are operated by the above-mentioned operation.

As described above, each magnetic disk device 13
By slightly shifting the power-on timings for a, 13b, 13c, and 13d, each device 1 can be changed as shown in FIG.
In 3a, 13b, 13c, 13d, the peak currents generated when the power is turned on do not overlap and are dispersed. As a result, the conventional method as shown in FIG. 5B (see FIG. 3B)
As compared with the conventional method, four peak currents are generated and the normal current value is gradually increased. Therefore, it is possible to operate the system with a smaller power supply device as compared with the conventional method.

In this embodiment, four magnetic disk power supplies 10a, 10b, 10c and 10d are provided as power supply devices, but the magnetic disk devices 13a, 13b,
It suffices that the power supplies 13c and 13d can be individually and selectively controlled, so that one power supply device can be used for each magnetic disk device 13a,
3b, 13c, 13d may be individually and selectively controlled.

Further, in the present embodiment, the magnetic disk device is used as the disk device. However, even when a plurality of other devices such as an optical disk device are provided, the same operation as the above embodiment,
It is possible to exert an effect.

Further, in the present embodiment, the case where all the magnetic disk devices 13a, 13b, 13c and 13d are sequentially operated and four devices are used simultaneously has been described as an example, but the frequency of use of the disk devices is low. At this time, the settings of the magnetic disk power supply control registers 21a, 21b, 21c, 21d may be changed so that a required number of magnetic disk devices are operated.

[0028]

As described above in detail, according to the disk power supply control method of the present invention, the power supplies of the disk devices are individually controlled, and the initial program storage disk device is powered on at the same time when the system power is turned on. Since the remaining disk devices are powered on one by one according to the order stored in the initial program, the power-on current at the time of power-on of the disk device is dispersed to keep the peak current value low and the small power supply device. The magnetic disk device can now be operated.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a disk power supply control system of the present invention.

FIG. 2 is a system configuration diagram showing a conventional disk power supply control system.

FIG. 3 is an explanatory diagram showing changes in peak current value in the conventional method.

FIG. 4 is a configuration diagram showing a magnetic disk power supply device control circuit unit included in the control unit of FIG. 1;

FIG. 5 is an explanatory diagram showing changes in peak current value in the method of the present invention.

[Explanation of symbols]

1 Operation Panel 2 Power Switch 3 IPL Disk Designating Switch 4 Main Body Control Unit Power Supply 5 Control Unit 8 Magnetic Disk Power Supply Device Control Circuit Unit 10a, 10b, 10c, 10d Magnetic Disk Power Supply 13a, 13b, 13c, 13d Magnetic Disk Device 21a, 21b , 21c, 21d Magnetic disk power supply control register 22a, 22b, 22c, 22d OR circuit 23 Decoder circuit

Claims (1)

[Claims] 1. In a computer system equipped with a plurality of disk devices, a power supply device for individually controlling the power-off of each disk device, and a power-off device for controlling the power-off of the power supply device at different times. Controlling the control means and the power-off control means,
An initial program storage disk in which a disk device storing an initial program is designated and the disk device is powered on at the same time as the power supply of the main body is turned on, and the other disk devices are sequentially powered on by shifting the time by the power-on / off control means. A disk power supply control method characterized by comprising a specifying means.