Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1991-03-04
1992-05-19
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7705, G11B 5596
Patent
active
051153602
ABSTRACT:
A disk drive comprising circular data tracks divided into sectors each of which includes a data field and a servo field containing embedded servo signals, an embedded signal sensor for sensing embedded servo signals on a data surface and a head positioning system for positioning a read/write head over a selected data track. The servo fields in the data tracks contain first and second embedded servo signals of substantially constant amplitude high-frequency bursts offset relative to each other and disposed on alternate sides of the track centerlines. The sensed signals corresponding to the first and second embedded servo signals are sampled and compared to provide a track error signal for positioning the read/write head over a selected data track.
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Digital Equipment Corporation
Garland Steven R.
Psitos Aristotelis
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