Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1996-11-12
1999-08-24
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 63, 360 7804, G11B 5596
Patent
active
059431792
ABSTRACT:
Tilt values between heads in a disk drive apparatus are previously measured. The measured values are stored in a head switch compensation table. In a head switch operation, a track nearest to the present position of a head to be used after a head switch operation is selected as a target track for the head to be used. A head switch compensation table is stored in a disk. The head switch compensation table stores tilt values represented by a number of tracks which corresponds to a relative deviation between heads. For example, if the table contains data showing that a tilt value between head 1 and head 2 is +1 track, then when heads are switched from head 1 to head 2, a target track for head 2 is selected by adding this value +1 to the current track address on which head 1 is positioned. By this method, head 2 can be positioned on the nearest track by a short time seek operation and can continue a sequential read or write operation.
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patent: 5404205 (1995-04-01), Kobayashi et al.
patent: 5463758 (1995-10-01), Ottesen
patent: 5506735 (1996-04-01), Okazaki
patent: 5523901 (1996-06-01), Anderson et al.
patent: 5677808 (1997-10-01), Cha et al.
International Business Machines - Corporation
Sniezek Andrew L.
Truelson Roy W.
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