Data reading method and storage device

Details Data reading method and storage device Data reading method and storage device

2007-05-10

2009-10-13

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077080

Reexamination Certificate

active

07602576

ABSTRACT:
A disk drive correctly recognizes newly written data when a plurality of readable data exist on the same sector of the same track, by comparing AGC values of each of the readable data, comparing error rates generated by Viterbi decoding, or both. An offset value determining means determines whether an offset value when the data is read has exceeded a predetermined value when the data is read. An offset control means controls the head, on the basis of the determination result of the offset value determining means, to conduct the offset operation on the opposite side of the track when the data is read the first time, and a selecting means selects the new data recorded in the sector by comparing the results obtained for both sets of data.

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patent: 2004-134077 (2004-04-01), None

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