Methods and apparatus determining and/or using overshoot...

Details Methods and apparatus determining and/or using overshoot... Methods and apparatus determining and/or using overshoot...

2005-12-13

2005-12-13

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

C360S046000, C360S067000

Reexamination Certificate

active

06975475

ABSTRACT:
The invention includes a testing method which may be applied to at least one writer in a disk drive during the self-test phase to generate write parameters, focused on the Over Shoot Control (OSC) of the write current parameter to improve the reliability of write operations by that writer. The Minimum OSC is used for write operations in normal temperatures. The Optimum OSC is used for a first lower temperature range, preferably between essentially 15° Centigrade and essentially 5° Centigrade. The Maximum OSC is preferred below essentially 5° C. The Minimum OSC should preferably guarantee both an Adjacent Track Write (ATW) criteria, as well as guarantee a Write Induced Instability (WII) criteria. The invention includes the write parameter collection, as well as the disk drive containing the generated write parameter collection. The invention also includes the method of using that write parameter collection to control a writer while writing to tracks belonging to the radial zone collection and program systems implementing the invention's methods.

REFERENCES:
patent: 5600500 (1997-02-01), Madsen et al.
patent: 6118614 (2000-09-01), Lee
patent: 6297921 (2001-10-01), Price et al.
patent: 6549353 (2003-04-01), Teterud
patent: 6696832 (2004-02-01), Chew et al.
patent: 6788489 (2004-09-01), Chang et al.

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