Recording current control method and magnetic disk drive

Details Recording current control method and magnetic disk drive Recording current control method and magnetic disk drive

2006-04-04

2006-04-04

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

C360S039000, C360S046000, C360S055000, C360S061000, C360S025000, C360S031000

Reexamination Certificate

active

07023641

ABSTRACT:
In a magnetic disk drive, a writing element and its surrounding area thermally expand due to the heat generated by a write head coil. The transient phenomenon of such thermal expansion may invoke the transient phenomenon of inadequate writing capacity, thereby causing a writing error at an early stage of a write operation. Control is provided which increases/decreases either or both the write current to be applied to a write head and the amount of its overshoot on an individual sector basis during a writing sequence.

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