Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1991-06-06
1993-08-03
Sikes, William L.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7705, 360 7707, 360 7801, 360 75, G11B 5596
Patent
active
052334864
ABSTRACT:
A method for correcting track counting errors during seeks of a servo head across the surface of a rotating disc of a hard disc drive. The number of tracks remaining in the seek is maintained in a tracks-to-go counter and the value in the counter is stored along with a plurality of previously stored counter values during each a sequence of equal time intervals. Potential track counting errors are detected by applying a first criterion to the stored counter values and first criterion is selected to yield false error detections for patterns of stored values satisfying a second criterion. For each potential track counting error, the second criterion is applied to the stored counter values and the tracks-to-go counter is incremented a selected number of times for patterns of stored values that do not satisfy the second criterion.
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Cunningham Terry D.
Heller III Edward P.
McCarthy Bill D.
Seagate Technology Inc.
Sikes William L.
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