Method of self-servo writing in a disk drive using multiple...

Details Method of self-servo writing in a disk drive using multiple... Method of self-servo writing in a disk drive using multiple...

2008-05-20

2008-05-20

Tzeng, Fred F. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

11413416

ABSTRACT:
A disk drive includes a head and a disk, spiral patterns are located on the disk, and the disk drive self-writes servo patterns on the disk using the spiral patterns as a reference for servoing the head. In an embodiment, the disk drive uses preliminary servo patterns to determine repeatable runout of the spiral patterns. In another embodiment, the disk drive reads each spiral pattern with multiple timing windows.

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