JPH01222324A - Disk device control system - Google Patents

Abstract

PURPOSE:To prevent the erroneous setting of a device number and the erroneous connection of interfaces by permitting a disk controller to output the device numbers of disk devices and device number setting signals. CONSTITUTION:The device numbers of the disk devices 2-4 are previously set in the registers 9-11 of the disk controller by programs. The disk controller 1 outputs the contents of the registers 9-11 to data signal interfaces 6-8 and outputs the device number setting signals showing that the deice numbers have been outputted to a control signal interface 5. The disk devices 2-4 which have received the device number setting signals store the contents outputted to the data signal interfaces 6-8 in registers 12-14 as the device numbers. Thus, the erroneous setting of device number of a disk device and the erroneous connection of the interfaces can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a disk device control method, and particularly to a process for setting a device number of a disk device.

(Prior Art) Conventionally, this type of disk device control method has generally included a method in which the disk device is provided with a mechanical switch, and the device number of the disk device is set by setting this switch.

Furthermore, the data signal interface is connected one-to-one between the disk control device and the disk device, and the connection terminals of the data signal interface in the disk control device are provided individually for each device number, and , was fixed.

(Problem to be Solved by the Invention) In the conventional disk device control method described above, if the device number setting switch of the disk device is incorrectly set or the data signal interface is incorrectly connected, the disk device The disk device does not work because the device number and the data signal interface connection do not match.
Therefore, it is necessary to carefully confirm the setting of the device number and the connection of the data signal interface, which is a problem in that it takes time and effort.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the disk device control method provided by the present invention includes a control signal interface for transmitting data related to various operations, and a data interface for transmitting read data or write data. In a disk control device that connects at least two disk devices each having a signal interface, a method for controlling these disk devices includes means for outputting a device number of the disk device to the data signal interface. The disk control device includes means for outputting a device number setting signal indicating that the device number has been output to the data signal interface, a register for storing the device number, and a device number setting signal of the disk control device. means for storing in the register the device number outputted by the device number output means of the disk control device to the data signal interface when the device number setting signal is outputted to the control signal interface by the output device; The disk device is characterized in that the disk device is equipped with the following.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a disk device control system according to an embodiment of the present invention.

In FIG. 1, a control signal interface 5 is an interface connected to each disk device 2.3 and 4 in a daisy chain, and a data signal interface 6.7 and 8 is an interface connected to each disk device 2. .3
and 4 on a one-to-one basis.

The disk device 2 connects to the disk control device 1 via a control signal interface 5 and a data signal interface 6.
The disk device 3 is connected to the disk control device 1 via the control signal interface 5 and the data signal interface 7, and the disk device 4 is connected to the control signal interface 5 and the data signal interface 8. It is connected to the disk control device 1 via.

Disk devices 2.3 and 4 have built-in registers 12.13 and 14 that store their respective device numbers.

The disk control device 1 has a register 9 that can set arbitrary values by a program and outputs the device numbers of the disk devices 2.3 and 4 to the data signal interfaces 6.7 and 8, respectively. .10 and 1
1 is built-in.

Next, the process of setting device numbers to the disk devices 2.3 and 4 will be explained.

The device numbers of disk devices 2.3 and 4 are stored in register 9.1 of disk control device 1 by a program in advance.
Set it to 0 and 11. The disk control device 1 outputs the contents of registers 9.10 and 11 to the data signal interfaces 6.7 and 8, respectively, and also outputs a device number setting signal indicating that the device number has been output to the control signal interface 5. do.

The disk drives 2.3 and 4 that have received the device number setting signal via the control signal interface 5 set the contents outputted to the data signal interfaces 6.7 and 8 at that time as the device number in the registers 12. 13 and 14. That is, the device number of disk device 2 is set in register 9, the device number of disk device 3 is set in register 10, and the device number of disk device f4 is set in register 11.

It should be noted that the registers 9, 10, and 11 do not have to be set by a program, and may output fixed values using a circuit.

(Effects of the Invention) As explained above, the present invention provides a device number setting that outputs a device number to a disk device to a data signal interface and indicates that the device number has been output to a control signal interface in a disk control device. Output a signal. Further, the disk device that receives this device number setting signal from the disk control device stores the device number output to the data signal interface in a built-in register.

Therefore, compared to conventional methods, there is no need to worry about setting device number setting switches or connecting interfaces.
Furthermore, it is possible to prevent erroneous setting of the device number of the disk device and erroneous connection of the interface.

Another advantage is that the setup time from the installation of the disk device to the start of operation can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a disk device control system according to an embodiment of the present invention. 1... Disk control device, 2.3.4... Disk device, 5... Control signal interface, 6.7゜8
...Data signal interface, 9.10.11゜12, 13.14...Register.

Claims (1)

[Scope of Claims] A disk control device that connects at least two disk devices each having a control signal interface for transmitting data related to various operations and a data signal interface for transmitting read data or write data,
A system for controlling these disk devices, comprising means for outputting a device number of the disk device to the data signal interface, and a device number setting signal indicating that the device number has been output to the data signal interface. the disk control device includes a register for storing the device number; and a register for storing the device number when the device number setting signal is output to the control signal interface by the device number setting signal output device of the disk control device. . A disk device control method, characterized in that the disk device includes means for storing in the register the device number outputted to the data signal interface by the device number output device of the disk control device.