Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2005-07-19
2005-07-19
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
06920011
ABSTRACT:
To solve the conventional problem in a disk drive unit that frequent interruptions be produced in a processor each time a head transits on a servo gate.To cope with the above-mentioned problem, a head drive unit17performs an off-track check using servo information read by the head2whenever the head2transits on each servo gate. Thus, an interruption processing required by the processor16is limited to the cases of either an operation completion interruption which is produced when a read/write operation is completed normally, or an error interruption which is produced on occurrence of the off-track or read error. This enables to reduce the number of interruption processing times performed in the processor16, which results in reducing the load of the processor16.
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Fujitsu Limited
Greer Burns & Crain Ltd.
Hudspeth David
Tzeng Fred F.
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