Head positioning control method and device for storage disk...

Details Head positioning control method and device for storage disk... Head positioning control method and device for storage disk...

2005-09-27

2005-09-27

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

C360S063000, C360S069000, C360S075000

Reexamination Certificate

active

06950258

ABSTRACT:
In a head positioning method and device in which the position of servo signals between heads is not uniform, it is aimed to reduce the time taken to find the servo signals when heads are switched. A storage disk device comprises storage disks with the servo signals, a plurality of heads that read the information from the storage disks, an actuator that moves the heads, and a control circuit that positions the heads based on the servo signals read from the storage disks by a selected head. This control circuit includes a synchronization circuit that, in response to a head switching cue, synchronizes the time of a servo gate signal (of the head to which switching is directed) for detecting a servo signal with the time of the servo signal read by the head to which switching is directed, and a processing circuit that reads the servo signal for the head in response to the synchronized detection signal and positions the head in response to the servo signal read.

REFERENCES:
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patent: 6081397 (2000-06-01), Belser
patent: 6208480 (2001-03-01), Tigner
patent: 6297926 (2001-10-01), Ahn
patent: 2003/0007276 (2003-01-01), Satoh
patent: 7220419 (1995-08-01), None
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patent: 94/12981 (1994-06-01), None
patent: WO-94/12981 (1994-06-01), None

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