JPS62239225A - Disk controller recognizing system - Google Patents

Abstract

PURPOSE:To eliminate troublesome work such as to modify the storage of device information by storing device type information required for controlling a disk on the side of each device and transmitting said device type information with the aid of an information switching signal to the side of a host computer at the time of reading from said side. CONSTITUTION:A host system side activates a read action in order to receive the device type information. Receiving an information switching instruction from the host system side, a disk device takes the information out of a device type information storage circuit 1, and a device type information transmission circuit 3 converts said information into that of the device type the same as information read out of a disk device read circuit 2 and transmits the inputted device type information to an information switching circuit 4. An ID decision circuit 5 obtains the device type information through the information switching circuit 4, and recognizes the type of device. Upon the completion of the reception of the device type information, a device type information reception instruction storage circuit 6 resets a reception indication.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk controller recognition system in a data processing device.

[Conventional technology]

Conventionally, disk control devices have been recognized by centrally storing information about each device connected to the system on the host computer side and retrieving this information.

[Problem that the invention seeks to solve]

The conventional disk controller recognition process described above is as follows.

On the host computer side, information on each device is stored according to a predetermined procedure, regardless of the disk control device, making storage operations cumbersome.

There is a drawback that memory failure may occur due to erroneous operation, and the recognition on the host computer side and the state of the device may not match.

[Means for solving problems]

A disk controller recognition system according to the present invention includes:

storage means for storing device type information in the disk device; sending means for converting the information from the storage means into a predetermined format and sending it to the host converter; and information sent by the sending means and the disk device. a switching means for switching between the information sent from the reading means and the information sent from the reading means based on a determination result from the determining means for determining whether or not a reading operation should be performed; and a device type information puller for controlling an information switching instruction of the switching means. and instruction storage means.

〔Example〕

Two embodiments of the present invention will be described below with reference to the drawings.

Referring to FIG. 1, a block diagram shows the configuration of an embodiment of a disk controller recognition system according to the present invention. In this embodiment, device type information storage circuit 1.
Disk device reading circuit 2, device type information sending circuit 3. Information switching circuit 4. ID determination circuit 5. Device type information takeover instruction storage circuit 6. and and Goodor.

Referring to FIG. 2, a time chart for explaining the operation of the apparatus of FIG. 1 is shown. Referring to FIG. 3, the ID determination circuit 5.device type information receiving instruction storage circuit 6. and judgment section (andket)
7 is illustrated by a flowchart.

Next, the operation will be explained.

The device type information storage circuit 1 in the disk device includes:
Device type information necessary for disk control such as maximum cylinder address, maximum cylinder address, maximum sector address, etc. is input.

The host system side initiates a read operation to retrieve device type information. Read data sent from the disk device is input to the ID determination circuit 5. The ID determination circuit 5 extracts ID information in step 51, and determines whether the ID information should be read by the Stella f52.

At this time, according to instructions from the host system, the device type information is retrieved and the Stella 7'61 is
And good door follows the instructions set in step 7.
1 makes a judgment, and if it is set, the ID judgment circuit 5
uses Stella f53 to request the disk device to send device type information.

Upon receiving an information switching instruction from the host system, the disk device extracts the information from the device type information storage circuit 1 and converts it into the same format as the information read out from the disk device reading circuit 2 by the device type information sending circuit 3. , sends the input device type information to the information switching circuit 4.

In step 54, the ID determination circuit 5 obtains device type information via the information switching circuit 4 and recognizes the disk device. When the device type information collection is completed, the device type information collection instruction storage circuit 6 resets the collection instruction.

Thereafter, the process returns to step 51 and the read operation is performed in the conventional manner. If the IDs match in step 52, the ID determination circuit 5 executes a normal read operation.

As is clear from the above description, in the read information transferred from the disk device, as shown in FIG. 4, device type information is first sent in an amount of information equivalent to one sector. Thereafter, two pieces of normal read information continue for a predetermined amount of information. As for the first information sent, if the device type information collection instruction is reset, the read information will be sent as before.

〔Effect of the invention〕

As is clear from the above description, according to the present invention.

By storing device type information necessary for disk control on each device side, and sending this stored device type information to the host computer side using an information switching signal when reading from the host computer side, secondary effective.

■ Eliminates the hassle of changing the storage of device information every time the system configuration changes.

(2) Although the disk devices controlled may differ depending on the type of host converter, the present invention can unify the recognition procedure for device information.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the disk controller recognition system according to the present invention, FIG. 2 is a time chart for explaining the operation of the device shown in FIG. 1, and FIG. A flowchart for explaining the operation, and FIG. 4 is a configuration diagram of information sent to the host system. 1: Device tag information storage circuit, 2: Disk device reading circuit, 3: Device live information sending circuit, 4: Information switching circuit, 5: ID determination circuit. 6: Device type information takeover instruction storage circuit. 7: And gate. Figure 1

Claims (1)

[Claims] 1. In a data processing device that performs control by recognizing disk device information, there is a storage device that stores device type information in the disk device, and a device that converts the information from the storage device into a predetermined format and sends it to a host computer. a switching means for switching between the information sent by the sending means and the information sent from the disk device reading means based on a determination result from a determining means for determining whether or not a read operation should be performed; , device type information takeover instruction storage means for controlling an information switching instruction of the switching means.