Compensation for variable servo track width

Details Compensation for variable servo track width Compensation for variable servo track width

2006-06-29

2008-12-02

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077080

Reexamination Certificate

active

07460328

ABSTRACT:
A track map of a disk drive is generated to compensate for various conditions. A track map is a stored measurement of every “half” servo track width on a disk. Every servo half track width is measured in the factory on a disk and then the data is stored on the disk for use during drive operations. When an individual track is accessed, the appropriate servo half track width data is pulled from memory and is used to adjust a scale factor for that local half track width. The track map may be used to compensate for various conditions including varying servo track width, microjog distance, and data track spacing.

REFERENCES:
patent: 6091566 (2000-07-01), Matsui et al.
patent: 7271977 (2007-09-01), Melrose et al.

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