Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2007-11-30
2010-02-02
Olson, Jason C (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S046000, C360S068000
Reexamination Certificate
active
07656603
ABSTRACT:
Disclosed is a self servo-writing disk drive that pre-programs a preamplifier to improve servo-writing characteristics in writing servo sectors to a disk. The disk drive implements operations including: writing servo sectors to define track bands according to sets of write setting values wherein the preamplifier adjusts write signals utilizing a set of write setting values for each track band; reading servo variable gain amplifier values from the tracks bands; selecting a set of write setting values associated with a minimum servo variable gain amplifier value; programming the preamplifier's write settings with the selected set of write setting values; and self-servo writing the disk with servo sectors utilizing the selected set of write setting values that are pre-programmed in the preamplifier.
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Blakely & Sokoloff, Taylor & Zafman
Olson Jason C
Western Digital Technologies Inc.
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