JPS5831463A - Magnetic disk controller - Google Patents

Abstract

PURPOSE:To execute gate loading operations of plural computer systems by one magnetic disk device, by adding a constant value to a seek address signal and executing a seak address conversion, by a positioning operation of the magnetic disk device. CONSTITUTION:A seek address signal 9 among magnetic disk control signals from a computer system 1 is applied to an adder 5. To one input part of the adder 5, an output signal 10 of a fixed value generating circuit 4 is connected, and to the seek address signal 9, one constant value is added, and it is varied. To other adders 5', 5'', too, fixed value generating circuits 4', 4'' are connected in the same way, and to each computer system, a different value is added. A gate circuit 6 selects an output signal of the adder 5 by a gate controlling signal 7. Subsequently, an OR circuit 8 combines output signals of the adders 5', 5'' with the varied seek address signal from the adder 5, and outputs them to a magnetic disk device 3, by which the magnetic disk device 3 virtually obtains plural ''0'' cylinders and ''0'' tracks.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a magnetic disk device, which performs seek-to-ypvxto conversion on * to virtually convert one magnetic disk device to a plurality of magnetic disk devices.
The present invention relates to a magnetic disk control device that can be operated as follows.

Conventionally, one magnetic disk device physically has only a few 0 cylinder 0 tracks, and a computer system has rounding performed on 0 to 0 tracks, and multiple combiator systems have 0 cylinders and 0 tracks. A separate disk device was required.

It is an object of the present invention to virtually store multiple 00 cylinder 10 tracks in a magnetic disk device, one OW&
Multiple O computer system 0f-) with air disk device
It would be advantageous to provide a disk control device that would allow the user to perform corrupt operations.

To round off the purpose of ζO, the control device according to the present invention includes an adder that changes the seek address signal to the magnetic disk device, and connects the output signal of the adder l1iI to the changed seek address signal, thereby creating one magnetic This is a configuration in which a disk device is configured with an OR circuit that performs theta address conversion so that a plurality of virtual disk devices exist.

The present invention will be described below with reference to the drawings.
Let's say 'j%/h.

III. Magnetic disk control arrangement according to an embodiment of the present invention! It is a ft2 ivy diagram systematically showing the 011 road.

In contrast to the magnetic disk device 3 of A1 based on ζOS theory, 3
comviator systems le 1', 1',
It has three 01 calculators and one logical sum circuit. First, from the combiator system, the seek address signal of the 01 disk control signals is sent to the adder. One input of the adder 5 is connected to the output coder 1 of the fixed value generating circuit 40, which changes the seek address signal by adding a constant value to it. 5' and 1IIK are similarly connected to fixed value generating circuits 4'e and 4', respectively, so that a different value can be added to each combination. 11 Hiro-)
Through the circuit C, an OR open circuit IKm is established. f-) The circuit 6 selects the adder SOaO signal by means of the r-) control signal 7. Similarly, the output signals of the am calculators s'p m'' are selected for the other G) It paths s'e g'. The output signals of ' or S' are combined and outputted to the magnetic disk device 3, thereby virtually creating a plurality of OO cylinder 0 stocks in the magnetic disk device 3.

As described above, in the present invention, in the magnetic disk device OI jointer operation, a certain value is added to the seek address signal to perform seek address conversion, and whether there are multiple OIk disk devices or O1m disk devices exists. By operating it in this way, you can use multiple computer systems to perform date loading operations from a disk device.

[Brief explanation of the drawing]

Figure YIjJHiro is a systematic tkWA diagram of a magnetic disk control device according to an embodiment of the present invention.IN-Comviator system, Nen-Magnetic disk control device, 3-11 disk device, 4-Constant value generation circuit , 5-・Adder, @-r-) circuit, Hatake-Rinsowaichiro. ] Procedural amendment (method) % formula % 1. Display of the incident Showa! s6 patent application No. 129618! No. 2, Issue 1
1O name Magnetic disk control device 3, relationship to the case of the person making the amendment Patent applicant address Homare 1, 5-33 Shiba, Minato-ku, Tokyo Name (name)
(428) NEC Corporation Representative Tadahiro Sekimoto 4, Attorney 6 There is no amendment regarding the content of the number of inventions that will be increased by the amendment.

Claims (1)

[Claims] Seek address compensation for the magnetic disk device - An adder that adds a constant IK value and changes the Ken-number appropriately, and an OR circuit that connects the addition IIO output signal of Rin to the above-mentioned changed nine-theta address compensation code. 1. A magnetic disk door control device characterized in that it performs seek address conversion that makes it appear as if a plurality of magnetic disk devices exist.