Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-05-23
2006-05-23
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
07050260
ABSTRACT:
A method and apparatus for partial self-servo writing a disk surface in a disk drive using servo wedge propagation is provided. In one embodiment, servo information is written by a servo track writer near an outer diameter of the disk surface. The servo information is grouped into a 1× set of servo information and a 2× set of servo information. The disk drive's read head is used to read the 1× set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 2× set of servo information. Then, the disk drive's read head is used to read the 2× set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 1× set of servo information. The process is repeated on a track-by-track basis until servo information is written from the outer diameter of the disk surface to the inner diameter of the disk surface, as if it was entirely written by a servo track writer.
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Brunnett Don
Guo Lin
Tung David M.
Hansra Tejpal S.
Hudspeth David
Maxtor Corporation
Tzeng Fred F.
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