JPH0520602A - Magnetic disk storage device - Google Patents

Abstract

PURPOSE:To increase speed of writing/reading of data on a magnetic disk storage device. CONSTITUTION:A same storage surface 11 of a same magnetic disk 1 is divided into plural storage areas, and also plural magnetic heads 2 corresponding to the number of divisions of the above-mentioned storage areas are provided, then the writing/reading of data on the divided storage areas respectively corresponding for every magnetic head are performed. The above-mentioned purpose is attained by reducing the moving amount of magnetic head to a specified track.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk storage device, and more particularly to a technique effectively applied to storing a large amount of data by using a disk-shaped magnetic recording medium, for example, a hard magnetic disk. Disk storage device (HD
The present invention relates to a technique effectively used for D).

[0002]

2. Description of the Related Art A magnetic disk storage device such as an HDD has a disk-shaped magnetic disk that is rotationally driven at high speed, and a magnetic head that writes / reads data to / from the storage surface of the magnetic disk. Data writing / reading is performed while moving the magnetic head in the radial direction of the magnetic disk. In this case, the storage surface of the magnetic disk is divided into a large number of storage tracks, and each track is further divided into a plurality of sectors. On the other hand, the magnetic head performs data write / read access to a designated sector of a designated track by moving in the radial direction of the magnetic disk (for example, "Nikkei Byte 1990" published by Nikkei BP).
November issue, "p. 236).

[0003]

However, the present inventor has clarified that the above-mentioned technique has the following problems. That is, for example, when alternately accessing the innermost track and the outermost track of the magnetic disk, the magnetic head must move the effective storage area of the magnetic disk in the radial direction from end to end. This movement of the magnetic head has been a major cause of slowing down the access speed in this type of magnetic disk storage device.

An object of the present invention is to provide a technique for speeding up data writing / reading in a magnetic disk storage device. The above and other objects and characteristics of the present invention will be apparent from the description of the present specification and the accompanying drawings.

[0005]

Among the inventions disclosed in the present application, a brief description will be given to the outline of typical ones.
It is as follows. That is, while dividing the same storage surface of the same magnetic disk into a plurality of storage areas, a plurality of magnetic heads corresponding to the number of divisions of the storage areas are provided, and data in the divided storage areas corresponding to each magnetic head is divided. Writing / reading is performed.

[0006]

According to the above-mentioned means, when a track for writing / reading data is designated, the nearest magnetic head of the plurality of heads is moved to the designated track to thereby move to the designated track. It is possible to minimize the moving time of the magnetic head. This achieves the purpose of speeding up data writing / reading in the magnetic disk storage device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

FIG. 1 shows an essential part of a magnetic disk storage device according to a first embodiment of the present invention, in which 1 is a disk-shaped hard magnetic disk, 2 is a magnetic head, and 3 is a head support. is there. The magnetic disk 1 is rotationally driven at high speed by a drive mechanism (not shown). The storage surface 11 of the magnetic disk 1 is partitioned into a large number of storage tracks, and each storage track is partitioned into a plurality of sectors for use.

The magnetic head 2 has two parts 21-1 and 21-2.
Are provided at regular intervals in the radial direction of the magnetic disk 1. The head support 3 is composed of the above-mentioned two magnetic heads 21.
-1, 1-2-2 are mounted, and are moved and driven in the radial direction of the magnetic disk 1 by a drive mechanism (not shown). The two magnetic heads 21-1 and 21-2 mounted on the head support 3 are adapted to write / read data on / from the same storage surface 11 of the same magnetic disk 1.

FIG. 2 shows the magnetic heads 21-1 and 21-2.
Shows an example of a circuit for selectively connecting the data write / read circuit 4 to the magnetic head 2
It is designed to be operated in conjunction with the movement of 1-1 and 21-2. Next, the operation will be described. When a storage track for writing / reading data is designated in the magnetic disk storage device shown in FIG.
Moves in the radial direction Y on the storage surface 11 of the magnetic disk 1 to move either one of the two magnetic heads 21-1 or 21-2 onto the designated storage track. Then, the magnetic head 21- moved to the designated track
By 1 or 21-2, data write / read access is performed in sector units.

At this time, the magnetic head to be moved on the designated track is selected to be closer to the designated track. For example, when a track on the inner circumference side of the storage surface 11 is designated, the magnetic head 21-1 located on the inner circumference side is moved onto the designated track. On the contrary, when the track on the outer peripheral side of the storage surface 11 is designated, the magnetic head 21-2 located on the outer peripheral side is moved onto the designated track. The magnetic head 21-1 or 21-2 moved to the designated track is selectively connected to the write / read circuit 5 via the selection circuit 4 illustrated in FIG.

As described above, when the track for writing / reading data is designated, the nearest magnetic head of the two magnetic heads 21-1, 21-2 is moved to the designated track. By doing so, it is possible to minimize the moving time of the magnetic head to the designated track. As a result, the writing / reading of data in the magnetic disk storage device can be speeded up. Further, since the moving amount of the magnetic head is small, the mechanism for moving the head support 3 is simplified, and the weight and size of the apparatus can be reduced.

FIG. 3 shows the essential parts of a magnetic disk storage device according to the second embodiment of the present invention. In this embodiment, the magnetic head 2 corresponding to the total number n of the storage tracks 6-1 to 6-n.
1-1 to 21-n are integrated and formed on a common head support 3, and a dedicated magnetic head is arranged for each storage track. When a track for writing / reading data is designated, by selecting the magnetic head located on the designated track, the magnetic heads 21-1 to 21-n are selected.
It is possible to perform write / read access of data on a designated track without moving. As a result, the writing / reading of data can be further speeded up, and the mechanism for moving the head support 3 can be eliminated to further reduce the weight and size of the apparatus.

FIG. 4 shows the essential parts of a magnetic disk storage device according to the third embodiment of the present invention. In this embodiment, in addition to the configuration of the second embodiment described above, the disk-shaped magnetic disk 1
Corresponding to a plurality of storage areas, so-called sectors 7-1 to 7-j, which are divided in the circumferential direction X of
-N) to (2j-1 to 2j-n) are provided. In this case, the head support 3 is formed in a disk shape so as to overlap the effective storage area of the magnetic disk 1. As a result, the waiting time until the designated sector reaches the reading position of the magnetic head due to the rotation of the disk 1 is shortened, and the data write / read access is made faster than in the second embodiment. Will be able to.

FIG. 5 shows a large number of magnetic heads (21-1 to 21-21).
An example of a circuit for selecting -n) to (2j-1 to 2j-n) is shown. As shown in the figure, a large number of magnetic heads (21-1 to 21-n) integratedly formed on the head support body 3 to
(2j-1 to 2j-n) can be performed by the selection lines Lx and Ly laid out in the matrix direction and the analog switch rows 8x and 8y that selectively select the selection lines Lx and Ly. . The selection circuit 4 can be integrally formed on the head support together with the magnetic heads (21-1 to 21-n) to (2j-1 to 2j-n).

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say. For example, the head support may be divided into a plurality of parts and a plurality of magnetic heads may be mounted on each of them in a module form. In the above description, the case where the invention made by the present inventor is mainly applied to the hard magnetic disk storage device which is the field of application as the background has been described. It can also be applied to devices.

[0017]

The outline of the typical inventions among the inventions disclosed in the present application will be briefly described as follows. That is, it is possible to obtain the effect that the writing / reading of data in the magnetic disk storage device can be speeded up, and the device can be easily reduced in size and weight.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of a magnetic disk storage device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration example of a magnetic head selection circuit applied to the apparatus of the first embodiment.

FIG. 3 is a diagram showing a main part of a magnetic disk storage device according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a main part of a magnetic disk storage device according to a third embodiment of the present invention.

FIG. 5 is a diagram showing a configuration example of a magnetic head selection circuit applied to the apparatus of the second or third embodiment.

[Explanation of symbols]

1 magnetic disk 2 magnetic head 3 head support 4 selection circuit 5 Writing / reading circuit 6-1 to 6-n storage tracks 7-1 to 7-j sector 8X, 8Y switch

Claims (3)

[Claims] 1. A magnetic disk storage device in which data is written / read by a magnetic head to / from a rotationally driven disk-shaped magnetic disk, wherein the same storage surface of the same magnetic disk has a plurality of storage areas. A magnetic disk storage device, characterized in that a magnetic head is provided for writing / reading data in each of the divided storage areas. 2. A plurality of magnetic heads for writing / reading data to / from each of a plurality of storage areas divided in the radial direction of a disk-shaped magnetic disk, and a common head support for the magnetic heads of the respective divided storage areas. The magnetic disk storage device according to claim 1, further comprising a head support mechanism which is mounted on a body and moved in a radial direction of the disk. 3. The magnetic disk storage according to claim 1, further comprising a plurality of magnetic heads for writing / reading data in / from a plurality of storage areas divided in the circumferential direction of the disk-shaped magnetic disk. apparatus.