Method of measuring non-coherent runout for a disk drive

Details Method of measuring non-coherent runout for a disk drive Method of measuring non-coherent runout for a disk drive

2009-05-29

2011-11-08

Sniezek, Andrew L (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077080

Reexamination Certificate

active

08054574

ABSTRACT:
In a disk drive, a modified adaptive runout compensation algorithm is employed to measure non-coherent repeatable runout (RRO) of a track. The adaptive runout compensation algorithm is used to control the transducer head to follow the average RRO of adjacent tracks during the process of computing correction factors for non-coherent RRO for a given track. The adaptive runout compensation algorithm does not completely adapt to both the coherent and non-coherent RRO of a particular track because the transducer head is positioned over any one particular track for only a limited number of revolutions.

REFERENCES:
patent: 6654198 (2003-11-01), Lin et al.
patent: 6898047 (2005-05-01), Shishida et al.
patent: 6963466 (2005-11-01), Baum et al.
patent: 6975480 (2005-12-01), Codilian et al.
patent: 2003/0112545 (2003-06-01), Hanson et al.
patent: 2003/0112546 (2003-06-01), Hansen et al.
patent: 2007/0297088 (2007-12-01), Sun et al.

Affiliated with

Also associated with

Rating

Method of measuring non-coherent runout for a disk drive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of measuring non-coherent runout for a disk drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of measuring non-coherent runout for a disk drive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4298009