Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2010-08-10
2011-10-04
Tzeng, Fred (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
08031428
ABSTRACT:
A self-servo-write system including a timing control module and a position control module. The timing control module is configured to generate (i) timing information of a first set of servo spirals and (ii) timing control signals for writing a second set of final servo wedges based on the timing information. The position control module is configured to generate (i) position information of the first set of servo spirals and (ii) positioning control signals for writing the second set of final servo wedges based on the timing information. Less than half of the servo spirals in the first set of servo spirals are over-written while writing the second set of final servo wedges. A ratio of a first number of final servo wedges in the second set of final servo wedges to a second number of servo spirals in the first set of servo spirals is a non-integer greater than one.
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Marvell International Ltd.
Tzeng Fred
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