Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-12-07
2009-11-10
Nguyen, Hoa T (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
07616399
ABSTRACT:
A disk drive comprising a moveable head, a disk, and a servo controller that implements servo control techniques to preserve PES continuity during track following operations is disclosed. The disk includes a plurality of tracks in which a substantial majority of the tracks include a plurality of servo sectors having a plurality of servo bursts that are utilized in track following operations. The servo controller controls track following operations with the moveable head and implements operations to preserve PES continuity during track following. These operations include: dividing tracks of the disk into a plurality of zones wherein each zone includes zone boundaries; and utilizing a PES equation for each zone to generate a PES value based upon read servo bursts wherein each zone PES equation includes a normalizing factor to account for boundary conditions associated with zone boundaries to preserve PES value continuity between zones.
REFERENCES:
patent: 5825579 (1998-10-01), Cheung et al.
patent: 5995316 (1999-11-01), Stich
patent: 6069764 (2000-05-01), Morris et al.
patent: 6091567 (2000-07-01), Cooper et al.
patent: 6101064 (2000-08-01), Shepherd
patent: 6130798 (2000-10-01), Chang et al.
patent: 6141175 (2000-10-01), Nazarian et al.
patent: 6188539 (2001-02-01), Elliot et al.
patent: 6310742 (2001-10-01), Nazarian et al.
patent: 6369974 (2002-04-01), Asgari et al.
patent: 6429995 (2002-08-01), Dobbek et al.
patent: 6522493 (2003-02-01), Dobbek et al.
patent: 6545830 (2003-04-01), Briggs et al.
patent: 6556367 (2003-04-01), Takahashi
patent: 6690523 (2004-02-01), Nguyen et al.
patent: 6707635 (2004-03-01), Codilian et al.
patent: 6757119 (2004-06-01), Leow et al.
patent: 6760185 (2004-07-01), Roth et al.
patent: 6826006 (2004-11-01), Melkote et al.
patent: 6847502 (2005-01-01), Codilian
patent: 6847503 (2005-01-01), Zhang et al.
patent: 6859341 (2005-02-01), Min et al.
patent: 6975480 (2005-12-01), Codilian et al.
patent: 6999267 (2006-02-01), Melkote et al.
patent: 7027256 (2006-04-01), Subrahmanyam et al.
patent: 2002/0034038 (2002-03-01), Ahn
patent: 2003/0112544 (2003-06-01), Harmer et al.
patent: 2003/0112545 (2003-06-01), Hanson et al.
patent: 2003/0112546 (2003-06-01), Hanson et al.
patent: 2003/0184909 (2003-10-01), Zhang et al.
patent: 2004/0021977 (2004-02-01), Lim et al.
patent: 2004/0225933 (2004-11-01), Seng et al.
patent: 2006/0024033 (2006-02-01), Cho
patent: 2007/0053098 (2007-03-01), Schell et al.
Thesis of Alexei Sacks PhD, Position Error Signal Generation in Magnetic Disk Drives, Carnegie-Mellon University.
Dennis Cahalan, Kiran Chopra, Effects of MR Head Track Profile Characteristics on Servo Performance, IEEE Transactions on Magnetics, vol. 30 No. 6, Nov. 1994.
Chen Min
Phan Duc T.
Wang Zhi
Blakely & Sokoloff, Taylor & Zafman
Habermehl James L
Nguyen Hoa T
Western Digital Technologies Inc.
LandOfFree
Disk drive servo control techniques to preserve PES continuity 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 servo control techniques to preserve PES continuity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk drive servo control techniques to preserve PES continuity will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4116591