Disk drive to characterize misaligned servo wedges

Details Disk drive to characterize misaligned servo wedges Disk drive to characterize misaligned servo wedges

2007-08-21

2009-06-23

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S051000

Reexamination Certificate

active

07551390

ABSTRACT:
Disclosed is a disk drive and method to characterize misaligned servo wedges. The disk drive includes an actuator arm, a head, a disk, and a servo controller. The head is connected to a distal end of the actuator arm in which the actuator arm is rotatable about a pivot to move the head radially over the disk. The servo controller is used to characterize misaligned servo wedges by implementing operations including: commanding the head to track follow on a track; measuring wedge-to-wedge time (WTWT) values corresponding to time intervals between identified servo wedges; calculating wedge-to-wedge time (WTWT) variations for the measured WTWT values; and characterizing the calculated WTWT variations, wherein, characterizing the calculated WTWT variations for the track includes utilizing a WTWT variation modeling function to model the WTWT variations.

REFERENCES:
patent: 5130866 (1992-07-01), Klaassen et al.
patent: 5297131 (1994-03-01), Tanaka
patent: 5589996 (1996-12-01), Patrick et al.
patent: 5594595 (1997-01-01), Zhu
patent: 5691857 (1997-11-01), Fitzpatrick et al.
patent: 5742446 (1998-04-01), Tian et al.
patent: 5751512 (1998-05-01), Anderson
patent: 5761165 (1998-06-01), Takeda et al.
patent: 5926338 (1999-07-01), Jeon et al.
patent: 5978168 (1999-11-01), Mathews et al.
patent: 5991115 (1999-11-01), Chainer et al.
patent: 5998994 (1999-12-01), Mori
patent: 6008640 (1999-12-01), Tan et al.
patent: 6008962 (1999-12-01), Le et al.
patent: 6014283 (2000-01-01), Codilian et al.
patent: 6052243 (2000-04-01), Shimada
patent: 6061201 (2000-05-01), Woods
patent: 6067205 (2000-05-01), Mathews et al.
patent: 6097559 (2000-08-01), Ottesen et al.
patent: 6288856 (2001-09-01), Ottesen et al.
patent: 6310742 (2001-10-01), Nazarian et al.
patent: 6317285 (2001-11-01), Bi et al.
patent: 6493169 (2002-12-01), Ferris et al.
patent: 6510017 (2003-01-01), Abdelnour
patent: 6568252 (2003-05-01), Boutaghou
patent: 6657810 (2003-12-01), Kupferman
patent: 6687078 (2004-02-01), Kim
patent: 6700724 (2004-03-01), Riddering et al.
patent: 6717764 (2004-04-01), Lake
patent: 6754025 (2004-06-01), Shepherd et al.
patent: 6754030 (2004-06-01), Seng et al.
patent: 6762899 (2004-07-01), Ottesen et al.
patent: 6785081 (2004-08-01), Chapin et al.
patent: 6798605 (2004-09-01), Kurita et al.
patent: 6801376 (2004-10-01), Smith
patent: 6822816 (2004-11-01), Dakroub
patent: 6847503 (2005-01-01), Zhang et al.
patent: 6865040 (2005-03-01), Fayeulle et al.
patent: 6914740 (2005-07-01), Tu et al.
patent: 6947248 (2005-09-01), Allen et al.
patent: 6972540 (2005-12-01), Wang et al.
patent: 6980383 (2005-12-01), Brunnett
patent: 6999266 (2006-02-01), Schmidt
patent: 7016131 (2006-03-01), Liu et al.
patent: 7038875 (2006-05-01), Lou et al.
patent: 7046463 (2006-05-01), Gay Sam et al.
patent: 7064659 (2006-06-01), Baumgartner et al.
patent: 7068451 (2006-06-01), Wang et al.
patent: 7068457 (2006-06-01), Riddering et al.
patent: 7095578 (2006-08-01), Ma
patent: 7099108 (2006-08-01), Zayas
patent: 7121133 (2006-10-01), Chu et al.
patent: 7124625 (2006-10-01), Kurita et al.
patent: 7126776 (2006-10-01), Warren, Jr. et al.
patent: 7136248 (2006-11-01), Tanner
patent: 7139149 (2006-11-01), Sun et al.
patent: 7158325 (2007-01-01), Hu et al.
patent: 7180692 (2007-02-01), Che et al.
patent: 7212374 (2007-05-01), Wang et al.
patent: 7251098 (2007-07-01), Wang et al.
patent: 7349170 (2008-03-01), Rudman et al.
patent: 7362534 (2008-04-01), Schreck et al.
patent: 2002/0054446 (2002-05-01), Smith
patent: 2002/0063545 (2002-05-01), Bloyer et al.
patent: 2002/0122267 (2002-09-01), Morioka
patent: 2002/0167745 (2002-11-01), Ottesen et al.
patent: 2003/0002183 (2003-01-01), Fioravanti
patent: 2003/0184899 (2003-10-01), Gay Sam et al.
patent: 2003/0218813 (2003-11-01), Dakroub
patent: 2007/0047133 (2007-03-01), Allen
patent: 2007/0127148 (2007-06-01), Yokohata et al.
patent: 2007/0146920 (2007-06-01), Kitamura et al.
patent: 2007/0188908 (2007-08-01), Kurita et al.
patent: 2007/0291401 (2007-12-01), Sun et al.

Affiliated with

Also associated with

Rating

Disk drive to characterize misaligned servo wedges does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Disk drive to characterize misaligned servo wedges, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk drive to characterize misaligned servo wedges will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4143830