Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-04-11
2006-04-11
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S077080
Reexamination Certificate
active
07027253
ABSTRACT:
Compensation for disk mode disturbances during self-writing of servo data is provided in a manner that accounts for differences in orientation between the disk surface from which position information is derived and the disk surface on which servo data is written. Microactuators corresponding to upper surfaces of disks may have a wiring polarity that is out of phase with the wiring polarity of microactuators corresponding to upper surfaces of disks so that disk mode compensation signals supplied to the microactuators produce motion in opposite directions. The servo control system may supply signals to microactuators individually and select the polarities of those signals to account for differences in orientation between the disk surface from which position information is derived and the disk surface on which servo data is written.
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Guo Lin
Li Yunfeng
Sun Yu
Foley & Lardner LLP
Hudspeth David
Maxtor Corporation
Slavitt Mitchell
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