JP2829154B2 - Magnetic disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive used for an electronic computer.

[0002]

2. Description of the Related Art Conventionally, a rotating shaft (1000 to 3000 rpm) is used.
m), 1 to 20 disks (diameter 10 to 50 cm) are mounted, the head is mounted on the arm, one for each magnetic surface, concentric tracks are selected, and the access time is the positioning time for moving the head. And the rotation waiting time for the disk to rotate, and the magnetic surface and the head are separated by a floating method using an air flow on the surface for high speed rotation.
3 ~ 0.5μm gap is maintained, 1 ~ 5G per unit
There are bytes and the fastest disk with the largest capacity.

[0003] The disk device reads / writes data after waiting for the position of data to be accessed by the head control device at a fixed position with respect to the rotating disk.

[0004]

However, there is a certain limit to the rotational speed of the disk, and the improvement in the disk rotation waiting time is small compared to the improvement in the processing speed of the CPU. was there.

The present invention relates to a disk access method, comprising a head control device which rotates concentrically with the disk around the rotating disk and relatively increases the disk rotation speed by going to the access position (rotation waiting time). To shorten the length of the magnetic disk drive).

[0006]

According to the present invention, there is provided a disk which is mounted on a rotating shaft and stores information on a disk-shaped magnetic surface, and which is arranged close to the magnetic surface of the disk and reads out the magnetization state of the magnetic surface. Or a head for changing, an arm for moving the head in the radial direction of the disk, a head positioner for controlling the movement of the arm in the radial direction, and a moving rail arranged concentrically with the disk outside the disk. And a head controller that houses the head positioner and is mounted on the moving rail so as to be movable in both circumferential directions, a solar cell that drives the head controller, and converts information transmitted from the head into optical signals A magnetic disk drive comprising: a first diode for transmitting information; and a second diode arranged to correspond to the first diode and transmitting a signal.

[0007]

According to the present invention, a magnetic disk device mounts a disk on a rotating shaft, stores information on a disk-shaped magnetic surface, arranges a head close to the magnetic surface of the disk, and reads the magnetization state of the magnetic surface. Or change this, move this head in the radial direction of the disk by the arm, control the movement of the arm in the radial direction, arrange a moving rail concentrically with the disk outside the disk, house the head positioner The head is moved on the moving rail in both circumferential directions, the head controller is driven by the solar cell, and the information transmitted from the head is converted into an optical signal and transmitted.

[0008]

Next, an embodiment of the present invention will be described. FIG. 1 shows a disk 3 mounted on a rotating shaft 14 and storing information on a disk-shaped magnetic surface, and a head 2 arranged close to the magnetic surface of the disk 3 for reading or changing the magnetization state of the magnetic surface.
An arm 12 for moving the head 2 in the radial direction of the disk 3; a head positioner 15 for controlling the radial movement of the arm 12;
A moving rail 4 arranged concentrically with the head, a head controller 1 containing a head positioner 15 and mounted on the moving rail 4 so as to be movable in both circumferential directions, and a head controller 1
, A diode 10 for transmitting information that converts information transmitted from the head 1 into an optical signal, and a photodiode 11 that is arranged corresponding to the diode 10 and transmits a signal. FIG.

That is, reference numeral 1 denotes a head control device which can move on the moving rail 4 in both directions.

Reference numeral 2 denotes a head for reading and writing information.

Reference numeral 3 denotes a disk for storing information.

Reference numeral 4 denotes a moving rail which enables the head controller 1 to move on the same center circle as the disk 3.

Reference numeral 5 denotes an arm for moving the head controller 1 on the moving rail 4.

Reference numeral 6 denotes a controller for calculating the position of the head controller and instructing movement.

Reference numeral 7 denotes a computer which uses a disk device.

By providing the head control device 1 which can rotate on a circle having the same center as the disk device,
The rotation speed of the disk 3, the rotation speed and the stop time of the head control device 1, and the access position calculated from the information position
By moving the head control device 1 to read and write information, it is possible to reduce the disk rotation waiting time.

That is, when a data read (write) request is issued to the disk device, the access position is determined from the position of the data to be accessed, the current position of the head controller 1, the disk rotation speed, the head controller moving speed, and the like. The head control device 1 is moved to that position.

FIG. 2 is a flow chart showing the operation of the head control device. When a data read / write request is issued in step 21, data is input in step 22 and an access point of data is determined in step 23.
In step 4, the head control device is moved, and in step 25, the head position is determined.

Reference numeral 8 denotes an energy supply lamp (red), 9 denotes a solar cell, and the light of the energy supply lamp 8 is transmitted to the diode 10 by the energy diode 10 by the HDD.
Reference numeral 11 denotes a diode for transmitting information (other than red), and reference numeral 11 denotes a photodiode for receiving the diode 10, which is used for transmitting information with the controller.

[0020]

According to the present invention, it is possible to provide a high-speed magnetic disk drive in which the waiting time for disk rotation can be reduced and the access time is short.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic disk drive showing one embodiment of the present invention.

FIG. 2 is a flowchart illustrating the operation of a head control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Head control device 2 ... Head 3 ... Disk 4 ... Moving rail 12 ... Arm

Claims (1)

(57) [Claims] 1. A disk mounted on a rotating shaft and storing information on a disk-shaped magnetic surface, a head arranged close to the magnetic surface of the disk for reading or changing the magnetization state of the magnetic surface, An arm for moving the head in the radial direction of the disk, a head positioner for controlling the movement of the arm in the radial direction, and a moving rail arranged outside the disk and concentrically with the disk,
A head control device that houses the head positioner and is mounted on the moving rail so as to be movable in both circumferential directions, a solar cell that drives the head control device, and converts information transmitted from the head into an optical signal. A magnetic disk drive, comprising: a first diode for transmitting information; and a second diode arranged corresponding to the first diode for transmitting a signal.