JPH0696546A - Magnetic-disk positioning-signal write device - Google Patents

Abstract

PURPOSE:To prevent that the width of a positioning signal becomes narrow and to increase the storage capacity of the title device by a method wherein a face on which one positioning signal is written is separated from a face on which the other positioning signal is written and the signals are written by shifting track pitches by 1/2. CONSTITUTION:An actuator (a) 7 is driven by an actuator control part 9, and a head (a) 3 is moved to a prescribed positional-signal write part by a position detection part 6. At this time, a positioning signal 11 from a positional-signal write part 5 is written to one face of a magnetic disk 2 on a magnetic disk apparatus 1 by means of a head (a) 4. In this case, a track pitch (p) in a region 15 for a positional signal written in the core width 1w of the head (a) and a track pitch (p) in a region 16 for a positional signal written in the core width 1w of the head (b) are shifted by a portion of (p)/2. As a result, the width of a positioning signal does not become narrow, the positioning signal can be obtained at a 1/2 pitch of prior art cases and the storage capacity of the magnetic disk apparatus can be increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for writing a positioning signal on a disk medium surface of a magnetic disk assembly, and more particularly to a magnetic disk positioning signal writing device for a magnetic disk device in which the pitch of the positioning signal is dense.

[0002]

2. Description of the Related Art In recent years, a magnetic disk positioning signal writing device tends to perform writing so that the pitch of the positioning signal becomes dense as the storage capacity of the magnetic disk device increases.

A conventional magnetic disk positioning signal writing device includes a plurality of magnetic disks incorporated in a magnetic disk device, heads corresponding to one surface of the plurality of magnetic disks, an actuator for moving the heads, and the heads. It is configured to include a connected positioning signal writing unit, a position detection unit connected to the actuator, and an actuator control unit connected to the actuator.

Next, a conventional magnetic disk positioning signal writing device will be described in detail with reference to the drawings.

FIG. 3 is a block diagram showing a conventional example, FIG.
FIG. 6 is a schematic diagram showing an example of a conventional position signal.

The magnetic disk positioning signal writing apparatus shown in FIG. 3 includes a plurality of magnetic disks 2 incorporated in the magnetic disk apparatus 1, heads 12 corresponding to one surface of the plurality of magnetic disks 2, and an actuator for moving the heads 12. 13, a positioning signal writing unit 5 connected to the head 12, and a position detection unit 6 connected to the actuator 13.
And an actuator control unit 9 connected to the actuator 13.

First, the actuator controller 9 drives the actuator 13 and the position detector 6 moves the head 12 to a predetermined position signal writing position. Next, the positioning signal 14 is written from the position signal writing unit 5 to the magnetic disk 2 of the magnetic disk device 1 by the head 12.
When the writing of one positioning signal 14 is completed, the actuator control unit 9 further drives the actuator 13 and the position detection unit 6 moves the head 12 to the next position signal writing position to write the positioning signal 14. The above operation is repeated to write the positioning signal 14 on one surface of the magnetic disk.

Details of the positioning signal written on the magnetic disk 2 will now be described with reference to FIG. The track width lt and the track pitch p are determined by the core width lw.

[0009]

In the conventional magnetic disk positioning signal writing device described above, the track pitch p is determined by the core width lw of the head 14. Therefore, if the track pitch p is made dense in order to increase the storage capacity of the magnetic disk device, the track width lw becomes narrow and the amplitude of the electric signal is attenuated.

[0010]

A magnetic disk positioning signal writing apparatus according to the present invention comprises a plurality of magnetic disks incorporated in a magnetic disk apparatus, a head (a) corresponding to one surface of the plurality of magnetic disks, and An actuator (a) for moving the head (a), a head (b) corresponding to one surface different from the surface corresponding to the head (a) of the plurality of magnetic disks, and the head (b). An actuator (b), a positioning signal writing unit connected to the heads (a) and (b), a position detection unit connected to the actuators (a) and (b), and the actuators (a) and ( and an actuator control unit connected to b).

[0011]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an example of the present invention. The magnetic disk positioning signal writing device shown in FIG. 1 includes a plurality of magnetic disks 2 incorporated in the magnetic disk device 1, a head (a) 3 corresponding to one surface of the plurality of magnetic disks 2, and a head (a) 3. An actuator (a) 7 for moving the head and a head (b) 4 corresponding to one surface of the plurality of magnetic disks 2 different from the surface corresponding to the head (a) 3.
An actuator (b) 8 for moving the head (b) 4, a positioning signal writing section 5 connected to the heads (a) 3 and (b) 4, and a position connected to the actuators (a) 7 and (b) 8. The detection unit 9 and the actuator control unit 9 connected to the actuators (a) 7 and (b) 8 are included.

First, the actuator control section 9 drives the actuator (a) 7 and the position detection section 6 moves the head (a) 3 to a predetermined position signal writing position. Here, the positioning signal 10 from the position signal writing unit 5 is sent to the head 1 of the magnetic disk 2 of the magnetic disk device 1 by the head 3.
Write on the surface. Similarly, the actuator control section 9 drives the actuator (b) 7 and the position detection section 6 moves the head (b) 4 to the position shifted by p / 2 shown in FIG. Here, from the position signal writing unit 5 to the positioning signal 1
1 is written on one surface of the magnetic disk 2 of the magnetic disk device 1 by the head (b) 4.

Next, when the writing of one positioning signal 10 is completed by the head (a) 3, the actuator control section 9 further drives the actuator 7 to drive the position detection section 6
Thus, the head (a) 3 is moved to the next position signal writing position deviated by p shown in FIG. 2 to write the positioning signal 10. Similarly, when the writing of one positioning signal 11 by the head (b) 4 is completed, the actuator control unit 9 drives the actuator 8 and the position detection unit 6 moves to the next position signal writing position deviated by p shown in FIG. The head (b) 4 is moved to write the positioning signal 11. The above operation is repeated, and the positioning signal 10 is placed on one side of the magnetic disk and the positioning signal 11 is placed on the other side of the magnetic disk.
Write in.

Details of the position signal written on the magnetic disk 2 will be described with reference to FIG. Area 15 of the position signal written with the core width lw of the head (a)
And the track pitch p of the region 16 of the position signal written with the core width lw of the head (b) are p
/ 2 minutes, but track width lw for one surface
And the track pitch p are the same as in the prior art.

[0016]

In the magnetic disk positioning signal writing device of the present invention, the writing surface of the positioning signal (a) and the writing surface of the positioning signal (b) are separately written by p / 2 offset. Therefore, since the width of the positioning signal does not become narrow, the reading peak level of the electric signal is not attenuated, and the positioning signal can be obtained at a 1/2 pitch of the conventional one, so that the storage capacity of the magnetic disk device is reduced. There is an effect that you can increase.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of a positioning signal shown in FIG.

FIG. 3 is a block diagram showing a conventional example.

FIG. 4 is a schematic diagram showing an example of the positioning signal shown in FIG.

[Explanation of symbols]

 1 magnetic disk device 2 magnetic disk 3 head (a) 4 head (b) 5 positioning signal writing unit 6 position detection unit 7 actuator (a) 8 actuator (b) 9 actuator control unit 10 positioning signal (a) 11 positioning signal ( b) 12 head 13 actuator 14 positioning signal 15 head (a) output and written position signal area 16 head (b) output and written position signal area

Claims (1)

[Claims] 1. A plurality of magnetic disks incorporated in a magnetic disk device, a head (a) corresponding to one surface of the plurality of magnetic disks, an actuator (a) for moving the head (a), and the plurality of magnetic disks. (B) corresponding to one surface of the magnetic disk different from the surface corresponding to the head (a), an actuator (b) for moving the head (b), and the heads (a) and (b) A positioning signal writing section connected to the actuators, a position detection section connected to the actuators (a) and (b), and an actuator control section connected to the actuators (a) and (b). And a magnetic disk positioning signal writing device.