Disk drive and method for retrying a read operation upon detecti

Details Disk drive and method for retrying a read operation upon detecti Disk drive and method for retrying a read operation upon detecti

1995-04-14

1997-10-28

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

360 66, G11B 509

Patent

active

056822723

ABSTRACT:
In a disk drive and a method for retrying to check data in the disk drive, a magnetic disk subsystem comprises a magnetic disk control unit and a drive module. The magnetic disk control unit is provided with a unit for controlling data check retry sequence which has a dummy write control unit. The drive module is provided with heads and a positioning unit. When the data read from the medium contain error, the above unit controls the data check retry sequence in order to read again the data using the same head. The dummy write control unit seeks a dummy write cylinder during the data check retry sequence, effects the dummy writing, seeks the original cylinder again, and reads the data again.

REFERENCES:
patent: 5189566 (1993-02-01), Christensen et al.
patent: 5461517 (1995-10-01), Suda et al.

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