Marking unreliable symbols in a hard disk drive read back...

Details Marking unreliable symbols in a hard disk drive read back... Marking unreliable symbols in a hard disk drive read back...

2007-06-26

2009-02-10

Chase, Shelly A (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error/fault detection technique

Reexamination Certificate

active

07490285

ABSTRACT:
A system for detecting errors in a channel comprises a decoder that generates first data when a number of symbols in error in a first detected sequence from the channel is less than or equal to a predetermined number, and that generates a failure indication when the number is greater than the predetermined number. A controller causes the decoder to receive a second detected sequence from the channel when the decoder asserts the failure indication and identifies corresponding symbols of the first and second detected sequences that differ.

REFERENCES:
patent: 5948116 (1999-09-01), Aslanidis et al.
patent: 6192499 (2001-02-01), Yang
patent: 6317850 (2001-11-01), Rothberg
patent: 6381725 (2002-04-01), Isokawa
patent: 6604220 (2003-08-01), Lee
patent: 6961197 (2005-11-01), Burd
U.S. Appl. No. 60/344,407, Burd et al.
U.S. Appl. No. 60/352,756, Burd et al.

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