Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2007-04-10
2007-04-10
Tzeng, Fred F. (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
11041941
ABSTRACT:
A method of testing quality of a servo burst signal recorded on a hard disk drive and a recording medium adapted therefor, the hard disk drive including a plurality of sectors within one track and the burst signals for servo control recorded radially on each sector. The method includes: detecting peak positions at a radial position in which amplitudes of the recorded burst signals peak respectively on each track; comparing the detected peak positions of the burst signals on each track; detecting peak position error count, the peak position error count being a number of tracks in which offset of the detected peak positions exceed an offset limit within a predetermined number of tracks; and if the peak position error count exceeds the offset limit, determining a write quality of the servo burst signal to be low. A servo burst signal recorded with uniform intensity and a servo burst signal recorded with shift from normal position can be detected. Therefore, the quality of a servo burst signal can be managed efficiently.
REFERENCES:
patent: 4639798 (1987-01-01), Harrison et al.
patent: 5170299 (1992-12-01), Moon
patent: 5416432 (1995-05-01), Lewis et al.
patent: 5889631 (1999-03-01), Hobson
patent: 6005739 (1999-12-01), Yun
patent: 6292913 (2001-09-01), Son
patent: 6611397 (2003-08-01), Nguyen
patent: 6678102 (2004-01-01), Liikanen et al.
patent: 6876506 (2005-04-01), Wakabayashi et al.
patent: 6907202 (2005-06-01), Ide et al.
patent: 2001/0036032 (2001-11-01), Fukushima et al.
European Search Report for Application No. 05001957.9-1239.
Chu Sang-hoon
Lee Yong-gwon
Park Cheol-hoon
Park Chul
Samsung Electronics Co,. Ltd.
Staas & Halsey , LLP
Tzeng Fred F.
LandOfFree
Method of testing servo burst signals of hard disk drive and... 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 testing servo burst signals of hard disk drive and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of testing servo burst signals of hard disk drive and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3767185