JPH0520774A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To relatively speed up the rotation of a disk by providing a head control device rotating on the concentric circumference of the disk around the disk and going to meet the access position. CONSTITUTION:The head 2 arranged near the magnetic surface of the disk 3 is moved in the radial direction of the disk 3 by an arm 12, and simultaneously, the moving of the head 2 in the radial direction of the arm 12 is controlled by a head positioner 15. And also, the head 2 is controlled by a head control device 1 freely and movably in the circumferential direction on a rail for moving 4 arranged concentrically to the disk 3. Them, the head is moved to the access position calculated by a calculater 7 and the read/write of information is executed. Consequently, the speed of the rotation of the disk is relatively increased and waiting time is shortened.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, a rotary shaft (1000 to 3000 rp)
1 to 20 disks (diameter 10 to 50 cm) are attached to m), the head is attached to the arm, one for each magnetic surface, concentric tracks are selected, and the access time is the positioning time for moving the head. It is given as the sum of the rotation waiting time for the disk to rotate, and because of the high speed rotation, the magnetic surface and the head are of the floating type that uses the air flow on the surface.
A gap of 3 to 0.5 μm is maintained and 1 to 5 G per unit
There are bytes and the largest high speed disks.

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

[0004]

However, the rotational speed of the disk is limited to some extent, and the improvement in the disk rotation waiting time is small compared to the improvement in the processing speed of the CPU, which causes a problem in system performance. was there.

According to the disk access method, the present invention is provided with a head control device which rotates on a concentric circle with the disk rotating around the disk, and relatively increases the disk rotation speed by going toward the access position (rotation waiting time). It is an object of the present invention to provide a magnetic disk device characterized in that

[0006]

The present invention is mounted on a rotary shaft.
A disk that stores information on a disk-shaped magnetic surface.
The magnetic state of the magnetic surface that is placed close to the magnetic surface of the disk
The head that reads or changes the state and this head
The arm that moves in the radial direction of the disc and the
A head positioner that controls the movement in the radial direction, and
A moving laser located on the outer side of the disk and concentric with the disk.
And the head positioner are stored, and both circles on the moving rail
With a head control device mounted so that it can move in the circumferential direction,
Transmission from the head and the solar cell that drives the head controller
First die for transmitting information for converting stored information into an optical signal
And the signal that is placed corresponding to this first diode.
And a second diode for transmitting the signal.
It is a disk device.

[0007]

In the present invention, the magnetic disk apparatus mounts the disk on the rotating shaft, stores information on the disk-shaped magnetic surface, and arranges the head close to the magnetic surface of the disk to read the magnetized state of the magnetic surface. Or, this head is moved in the radial direction of the disk by the arm, the radial movement of the arm is controlled, the moving rail is arranged outside the disk and concentric with the disk, and the head positioner is housed. The head control device is driven by the solar cell by moving on the moving rail in both circumferential directions, and the information transmitted from the head is converted into an optical signal and transmitted.

[0008]

EXAMPLE An example of the present invention will be described below. FIG. 1 shows a disk 3 mounted on a rotary shaft 14 for 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, and the disk 3 outside the disk 1.
A head control device 1 that accommodates a moving rail 4 and a head positioner 15 that are arranged concentrically with each other and that is mounted on the moving rail 4 so as to be movable in both circumferential directions, and a head control device 1
A solar cell 9 for driving the device, an information transmission diode 10 for converting the information transmitted from the head 1 into an optical signal, and a photodiode 11 arranged corresponding to the diode 10 for transmitting a signal. 2 shows a magnetic disk device.

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

A head 2 reads and writes information.

A disk 3 stores information.

A moving rail 4 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 control device 1 on the moving rail 4.

Reference numeral 6 denotes a controller, which performs positioning calculation and head movement instruction of the head controller.

A computer 7 uses a disk device.

By providing the head control device 1 capable of rotating on a circle having the same center as the disk device,
At the access speed calculated from the rotation speed of the disk 3, the rotation speed and stop time of the head controller 1, and the information position,
By moving the head controller 1 to read / write information, it is possible to shorten 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 control device 1, the disk rotation speed, the head control device 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 controller. When a data read / write request is issued in step 21, the data is input in step 22, the data access point is determined in step 23, and step 2 is entered.
The head controller is moved in step 4, and the head position is determined in step 25.

Reference numeral 8 is an energy supply lamp (red), 9 is a solar cell, and the light of the energy supply lamp 8 is supplied to a diode 10 and the energy diode 10 is an HDD.
Reference numeral 11 is a diode for transmitting information (other than red), and 11 is 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 which can shorten the waiting time for disk rotation and have a short access time.

[Brief description of drawings]

FIG. 1 is a perspective view of a magnetic disk device showing an embodiment of the present invention.

FIG. 2 is a flow chart explanatory view showing the operation of the head control device.

[Explanation of symbols]

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

Claims (1)

Claim: What is claimed is: 1. A disk mounted on a rotary shaft for accumulating information on a disk-shaped magnetic surface, and a magnetized state of the magnetic surface arranged near the magnetic surface of the disk. Or, a head to be changed, 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 disk arranged outside the disk and concentric with the disk. With a moving rail,
A head control device that accommodates the head positioner and is movably mounted on the moving rail in both circumferential directions, a solar cell that drives the head control device, and information transmitted from the head is converted into an optical signal. A magnetic disk device comprising a first diode for transmitting information and a second diode arranged corresponding to the first diode for transmitting a signal.