Servo pattern deviation correcting method and disk apparatus...

Details Servo pattern deviation correcting method and disk apparatus... Servo pattern deviation correcting method and disk apparatus...

2006-07-25

2006-07-25

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S048000

Reexamination Certificate

active

07082008

ABSTRACT:
In a servo pattern deviation correcting method and disk apparatus of the present invention, a read/write head writes information to a disk and reads information from the disk. Servo pattern blocks are written to respective sectors of the disk along a target track. A deviation of each servo pattern block from a position of the track in a transverse direction is detected. A deviation correction pattern for each servo pattern block is created based on the deviation of the servo pattern block. The deviation correction pattern is written to a predetermined region of the disk between each servo pattern block and a data region along the track. The deviation correction pattern is read from the predetermined region of the disk, so that the read/write head is shifted to a deviation-corrected position on the track based on the servo pattern block and the deviation correction pattern.

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patent: 07-078321 (1995-03-01), None
patent: 07-334932 (1995-12-01), None

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