Disk drive excluding servo sub-bursts when computing...

Details Disk drive excluding servo sub-bursts when computing... Disk drive excluding servo sub-bursts when computing...

2011-03-01

2011-03-01

Nguyen, Hoa T (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S031000

Reexamination Certificate

active

07898762

ABSTRACT:
A disk drive is disclosed comprising a head actuated over a disk, the disk including a plurality of servo sectors wherein each servo sector comprises at least one servo burst. A read signal emanating from the head is sampled while reading a servo burst in a servo sector to generate a plurality of sample values. A quality metric is generated in response to a plurality of sample values of a servo sub-burst representing part of the servo burst. When the quality metric does not exceed a threshold, the servo sub-burst sample values are excluded when generating a position error signal (PES) representing a position of the head over the disk. When the quality metric exceeds the threshold, the servo sub-burst sample values are included when generating the PES. The head is then positioned over the disk in response to the PES.

REFERENCES:
patent: 4438467 (1984-03-01), Schaller et al.
patent: 5483393 (1996-01-01), Mento et al.
patent: 5710677 (1998-01-01), Teng et al.
patent: 5798883 (1998-08-01), Kim
patent: 5870243 (1999-02-01), Ukani et al.
patent: 5930068 (1999-07-01), Gregg et al.
patent: 6005739 (1999-12-01), Yun
patent: 6144513 (2000-11-01), Reed et al.
patent: 6151180 (2000-11-01), Bang
patent: 6172836 (2001-01-01), Bang
patent: 6445522 (2002-09-01), Tsunoda et al.
patent: 6476997 (2002-11-01), Fukushima et al.
patent: 6611397 (2003-08-01), Nguyen
patent: 6687080 (2004-02-01), Smith et al.
patent: 6735040 (2004-05-01), Galloway et al.
patent: 6791778 (2004-09-01), Chu et al.
patent: 6906883 (2005-06-01), Chu et al.
patent: 7009391 (2006-03-01), Lee et al.
patent: 7161759 (2007-01-01), Zhang et al.
patent: 7203024 (2007-04-01), Lee et al.
patent: 7209314 (2007-04-01), Bandic et al.
patent: 7212364 (2007-05-01), Lee
patent: 7248426 (2007-07-01), Weerasooriya et al.
patent: 7391583 (2008-06-01), Sheh et al.
patent: 7746592 (2010-06-01), Liang et al.
patent: 2007/0273992 (2007-11-01), Kuroda
patent: 2008/0239536 (2008-10-01), Asakura

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