Disk device and disk medium, in which a plurality of servo...

Details Disk device and disk medium, in which a plurality of servo... Disk device and disk medium, in which a plurality of servo...

2006-03-14

2006-03-14

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

C360S077080, C360S078140

Reexamination Certificate

active

07012773

ABSTRACT:
A disk device and a disk medium are disclosed in which a plurality of servo cylinders on the surface of at least one disk are divided into several areas, and a different servo signal frequency is set and recorded for each of the areas. The servo cylinders are divided into predetermined areas, and a different servo signal frequency for each of the areas is set so that the recording density of the servo signal recorded in the disk can be set so as to allow the servo signal demodulation characteristic to be included in a relatively superior range. In the disk device, the boundary between the area of a first servo signal frequency and the area of a second servo signal frequency adjoining the first servo signal frequency area is preferably formed with an area in which a servo signal pattern written with the first servo signal frequency and a servo signal pattern written with the second servo signal frequency are arranged on the same servo cylinders.

REFERENCES:
patent: 5684651 (1997-11-01), Yaegashi et al.
patent: 6084738 (2000-07-01), Duffy
patent: 6178056 (2001-01-01), Cloke et al.
patent: 6278568 (2001-08-01), Cloke et al.
patent: 3-120968 (1991-06-01), None
patent: 5-94674 (1993-04-01), None
patent: 5-174516 (1993-07-01), None
patent: 10-255416 (1998-09-01), None
patent: 2973247 (1999-09-01), None

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