Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2008-05-14
2009-10-13
Sniezek, Andrew L (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S076000, C360S077080
Reexamination Certificate
active
07602575
ABSTRACT:
A disk drive is disclosed comprising control circuitry for self servo writing a disk. An estimated reader/writer offset is initialized, servo bursts in a first servo track are read, the head is moved radially using the estimated reader/writer offset, and propagated servo bursts are written to a target servo track. The propagated servo bursts are read from the target servo track to generate a read signal, the read signal is processed to generate a burst crossing signal (BCS), and the estimated reader/writer offset is adjusted in response to the BCS.
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Bryant Lawrence M.
Lifchits Yakov M.
Weerasooriya Siri S.
Ying Wing
Sheerin, Esq. Howard H.
Sniezek Andrew L
Western Digital Technologies Inc.
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