Disk drive write control by servo gain

Details Disk drive write control by servo gain Disk drive write control by servo gain

2007-10-23

2007-10-23

Tzeng, Fred F. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

11445744

ABSTRACT:
A method of controlling a disk drive is disclosed that is capable of precise and real-time detection of an abnormal floating height of a magnetic head over an entire area of a magnetic disk. The method of controlling the disk drive includes the steps of: calculating a servo gain difference between a servo gain value obtained from a servo frame of the disk drive and a normal servo gain value recorded in the servo frame, the normal servo gain value being a servo gain value when a magnetic head flies normally relative to a magnetic disk; and forbidding the magnetic head writing data into the magnetic disk when the servo gain difference is equal to or greater than a predetermined value.

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