JPH0383275A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To make the positioning of a magnetic head high accurate and to promote the track density by writing information for positioning the magnetic head on an optical disk. CONSTITUTION:The subject device is provided with information recording magnetic disks 1-1 to 1-n, a tracking optical disk 2 and a linear actuator 8 for driving a positioning arm 7 fixed commonly with magnetic heads 5-1 to 5-n and an optical head 6. The individual magnetic heads 5-1 to 5-n are positioned by a control signal from the optical disk 2. Thus, by using the optical disk 2 for controlling the positioning, the track density of the magnetic disk 1i is promoted, and hence the high densification can be contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device capable of high-density recording using optical tracking.

[Conventional technology]

A conventional magnetic disk device has a plurality of magnetic disks for recording information attached to a common shaft, as well as a magnetic disk for tracking that records track position information, and a magnetic head corresponding to each magnetic disk. The positioning arm, which is commonly attached to the magnetic disk, is configured to be controlled by a control signal from the tracking magnetic disk.

FIG. 2 is a perspective view showing the configuration of an example of a conventional magnetic disk device. In the magnetic disk device shown in FIG. 2, n information recording magnetic disks (1-1) to (1-n) and a tracking magnetic disk 9 are connected to a motor 4 via a common shaft 3. and magnetic heads (5-1) to (5-n) and 1 facing the storage surface of each magnetic disk.
The positioning arm 7 to which 0 is commonly fixed is controlled by a control signal from a tracking magnetic disk 9 and is configured to be driven by a linear actuator 8.

[Problem to be solved by the invention]

In conventional dual magnetic disk drives, the radial position of the magnetic head is determined based on position information recorded in advance on the tracking magnetic disk, so this positioning accuracy limits the track density of the magnetic disk. One of the factors is that the track density, which represents the information recording density in the radial direction, is one order of magnitude smaller than the linear density, which represents the information recording density in the circumferential direction, which hinders an increase in storage capacity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic disk device that can eliminate the drawbacks mentioned above and improve track density.

[Means to solve the problem]

The magnetic disk device of the present invention includes n magnetic disks for recording information (n is a positive integer), one optical disk for tracking, and a penetrating center of the magnetic disk and the optical disk to commonly fix them. a motor for rotating the shaft; and an actuator for driving and controlling a positioning arm to which a magnetic head corresponding to the magnetic disk and an optical head corresponding to the optical disk are fixed in common using a tracking control signal from the optical disk. Configured with the necessary features.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention.

The magnetic disk device shown in FIG. 1 includes n magnetic disks (1-1,) to (1-n, ) for information recording, one optical disk 2 for tracking, and Shaft 3 that penetrates and fixes these in common
, a motor 4 connected to the shaft 3, and a magnetic head (5).
-11 to (5-n) and a linear actuator 8 that drives a positioning arm 7 to which an optical head 6 is fixed in common, and each magnetic head (5-1) to (5-n) is controlled by the optical disk 2. It is configured to be positioned by a signal.

The tracking accuracy of optical disk devices is higher than that of magnetic disk devices, and the track density of optical disks is one order of magnitude higher than that of magnetic disks using current conventional technology. . Therefore, by using the optical disk for positioning control, it is possible to increase the track density of the magnetic disk by -E.

- In the embodiment described above, the positioning arm was explained to be driven by a linear actuator that drives in a linear direction, but a similar configuration is also possible using an actuator that drives rotationally.

〔Effect of the invention〕

As explained above, the present invention allows the magnetic head to be positioned with high precision by injecting the positioning information of the magnetic head into the optical disk instead of the magnetic disk, thereby increasing the track density and increasing the capacity. This has the effect of realizing a magnetic disk device.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the structure of an embodiment of the present invention, and FIG. 2 is a perspective view showing the structure of an example of a conventional magnetic disk device. <1-1>~(1-n>...Magnetic disk, 2
...Optical disc, 3...Shaft, 4
...Motor, (5-1) ~ (5-n),
10---Magnetic head, 6... Optical head, 7... Positioning arm, 8...
Linear actuator, 9...-Magnetic disk for tracking.

Claims (1)

[Claims] n magnetic disks (n is a positive integer) for information recording, one optical disk for tracking, a shaft that passes through the center of the magnetic disk and the optical disk and fixes them in common, and rotates this shaft. A motor that makes
A magnetic disk device comprising: an actuator that drives and controls a positioning arm to which a magnetic head corresponding to the magnetic disk and an optical head corresponding to the optical disk are commonly fixed, using a tracking control signal from the optical disk.