Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data clocking
Reexamination Certificate
2006-03-21
2006-03-21
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data clocking
C360S075000, C360S077080
Reexamination Certificate
active
07016134
ABSTRACT:
A method of writing product servo sectors to a disk of a disk drive is disclosed. An external spiral servo writer writes a plurality of spiral tracks to the disk by actuating in a closed loop system a head positioning pin inserted into the disk drive. Each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark. The high frequency signal and sync marks in the spiral tracks are demodulated to maintain synchronization of a servo write clock as well as maintain the head along a circular target path while writing product servo sectors to the disk.
REFERENCES:
patent: 5576906 (1996-11-01), Fisher et al.
patent: 5668679 (1997-09-01), Swearingen et al.
patent: 6411453 (2002-06-01), Chainer et al.
patent: 6429989 (2002-08-01), Schultz et al.
patent: 6507450 (2003-01-01), Elliott
patent: 6519107 (2003-02-01), Ehrlich et al.
patent: 6587293 (2003-07-01), Ding et al.
patent: 6704156 (2004-03-01), Baker et al.
patent: 6738205 (2004-05-01), Moran et al.
Agarwal Vinay K.
Chue Jack M.
Cloke Robert L.
Davidson Dan I
Hudspeth David
Sheerin, Esq. Howard H.
Western Digital Technologies Inc.
LandOfFree
Using an external spiral servo writer to write spiral tracks... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Using an external spiral servo writer to write spiral tracks..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Using an external spiral servo writer to write spiral tracks... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3610037