JPH01237985A - High speed reading/writing system for disk device - Google Patents

Abstract

PURPOSE:To attain the high speed reading/writing of a disk device by control ling simultaneously independently plural reading writing heads, and moving other head to next while executing reading/writing by one head. CONSTITUTION:A control part 109 receives the action instruction of a reading/ writing procedure from a host 111, distributes it to a head A101 and a head B102 and reads/writes a disk 100. At present, when the instruction of movement 1 is executed from the host 111, the control part 109 gives an instruction to a head A moving mechanism 103 and moves the head A101 to a recording area 1. After completion, the host 111 gives the instruction of movement 2 before the reading/writing of the area 1 and before the completion of the movement 2, gives the instruction of a reading/writing 1. Next, the control part 109 moves the head B102 to a recording area 2 and reads/writes the area 1 with the head A101 simultaneously. The host 111 receives the completion of both movement 2 and the reading/writing 1 and executes continuously the movement 3 and reading/writing 2. Thereafter, the control part 109 moves the head A101 to a storing area 3 and reads/writes the area 2 with the head B102.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a storage device for an information processing device, and particularly to speeding up information input/output of a randomly accessible disk device.

BACKGROUND OF THE INVENTION Conventionally, a randomly accessible disk device has one read/write head for each recording surface.
Therefore, in order to read or write information one after another from multiple recording areas distributed on the recording surface, as shown in Figure 3, move the head to area 1, read/write from area 1, and then move the head to the next area. Move to 2, read/write area 2,...
・I had no choice but to take the following steps.

Problems that the invention aims to solve In other words, conventional random access disk devices.

It is necessary to mechanically move the head from area 1 to area 2 by interrupting reading and writing between reading and writing in area 1 and reading and writing in area 2, and this moving operation interrupts information transmission. This caused time loss.

The present invention has been made in view of the above-mentioned conventional situation,
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a new high-speed read/write method for a disk device that can overcome the above-mentioned drawbacks inherent in the conventional technology.

Means for Solving the Problems In order to achieve the above object, the high-speed read/write method of the disk device according to the present invention reads the entire disk recording surface or It is configured to include a plurality of heads that can be read and written and that can be controlled independently of each other, and a control means that independently controls the plurality of heads.

Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a block diagram showing an example of the hfj according to the present invention, and FIG. 2 is the tights and chart thereof.

Referring to FIGS. 1 and 2, the control unit +09 receives operation instructions from the host 111 in the procedure shown in FIG. Reading and writing from and to the disk 100 is performed, but it is necessary to make changes to FIG. 2, which shows this procedure, from FIG. 3, which shows the procedure of the conventional system.

Specifically, when the host I11 issues an instruction to move 1, the control unit +09 issues an instruction to the head A moving mechanism 103 to move the head (^)Iol to the recording area 1. After the completion of movement 1 and before reading/writing from recording area 1, the host Il+ issues an instruction for movement 2, and then issues an instruction for reading/writing 1 without waiting for the completion of movement 2.Control unit +09 controls the head (B). 102 to the recording area 2, and at the same time move the head (
^) Reading and writing to recording area 1 is performed in step 101. Upon completion of both move 2 and read/write 1, host I11 moves to move 3.
Give instructions for reading and writing 2 in succession. Control part +09
While moving head (A)+111 to storage area 3,
To... Read and write data in the recording area 2 using the gutter (n) 102.

After that, this process is repeated, but after both the movement to the desired final recording area and the reading/writing of the penultimate recording area are completed, the post 111 issues only a read/write instruction for the final recording area and does not issue a movement instruction. The procedure ends when reading and writing to the final recording area is completed.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a plurality of read/write heads can be controlled simultaneously and independently - one head can read or write while the other heads are moving from one head to the next. This has the effect of reducing time loss due to movement when there is only one option available.

Furthermore, according to the present invention, by controlling one head for writing only and another head for reading only for continuous recording areas, it is possible to immediately verify written data and improve the reliability of writing. It is possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. +00... One side of the disk medium, +01... Read/write head A, 102... Read/write head B, 103...
...Head A moving mechanism, l 04--Head B moving mechanism, 105... Head A read/write data line, 106... Head B read/write data line, 107...
・Head A movement signal line, 108... Head B movement signal line, 109... Control unit (interprets instructions from the host,
Distribution of control signals and write signals to heads A and B,
(integrates read signals from heads A-B, etc.), +
10...Disk device control signal/disk read/write signal line, II+...Host (information processing device that exchanges information with the disk device) Fig. 2 shows the time for implementing the present invention with the configuration shown in Fig. 1. This chart shows instructions from the host, operations of heads A and B, and exchange of read and write data with the host. FIG. 3 is a time chart according to the conventional method for comparison with FIG. 2. Patent applicant: Representative of NEC Corporation Patent attorney: Yutabe Kumagai

Claims (1)

[Claims] A disk device capable of randomly reading or writing information from a disk-shaped recording medium, including a plurality of heads that read or write information to one recording surface of the recording medium, and each of the plurality of heads independently operating the plurality of heads. control means for reading or writing, and by independently controlling the plurality of heads using the control means, a plurality of discontinuous recording areas on the same recording surface of the recording medium can be recorded. A high-speed read/write method for disk devices that is characterized by the ability to read or write spanning information at high speed.