Disk drive correcting track address during a write operation

Details Disk drive correcting track address during a write operation Disk drive correcting track address during a write operation

2008-05-06

2008-05-06

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Recording-or erasing-prevention

C360S049000

Reexamination Certificate

active

07369343

ABSTRACT:
A disk drive is disclosed comprising a head actuated over a disk having a plurality of servo tracks, wherein each servo track comprises a plurality of servo sectors and each servo sector comprises a track address. A read signal from the head representing a first track address in one of the servo sectors is processed in order to generate a detected track address which is compared to a first target track address to obtain a first track address error. A correction metric is generated representing a likelihood that the first track address error was caused by a detection error, and if the correction metric exceeds a threshold, the detected track address is corrected in response to the first track address error, and the write operation is continued. If the correction metric does not exceed the threshold, the write operation is aborted.

REFERENCES:
patent: 5392302 (1995-02-01), Kemp et al.
patent: 5661760 (1997-08-01), Patapoutian et al.
patent: 5914830 (1999-06-01), Kadlec et al.
patent: 5961658 (1999-10-01), Reed et al.
patent: 5982308 (1999-11-01), Bang
patent: 6034829 (2000-03-01), Suzuki et al.
patent: 6185173 (2001-02-01), Livingston et al.
patent: 6201652 (2001-03-01), Rezzi et al.
patent: 6392831 (2002-05-01), Yeo et al.
patent: 6516443 (2003-02-01), Zook
patent: 6587987 (2003-07-01), Vasic et al.
patent: 6661593 (2003-12-01), Ashikaga et al.
Hang Nguyen, Pierre Duhamel, “Optimal Soft-Output Viterbi Algorithm”, 3rd International Conference on Networking (ICN 04), Mar. 2004.
E. Yeo, S. Augsburger, W. Davis, B. Nikolic, “A 500-Mb/s Soft-Output Viterbi Decoder”, IEEE Journal of Solid-State Circuits, vol. 38, No. 7, Jul. 2003.
Ali Ghrayeb, C. X. Huang, “Improvements in SOVA-Based Decoding for Turbo-Coded Storage Channels”, IEEE Transactions on Magnetics, vol. 41, No. 12, Dec. 2005.
Roger Wood, “Turbo-PRML: A Compromise EPRML Detector”, IEEE Transactions on Magnetics, vol. 29, No. 6, Nov. 1993.

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