Disk drive self-servo writing using fundamental and higher...

Details Disk drive self-servo writing using fundamental and higher... Disk drive self-servo writing using fundamental and higher...

2007-04-03

2007-04-03

Korzuch, William (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

C360S032000, C360S039000, C360S067000, C360S075000, C360S077050

Reexamination Certificate

active

10251270

ABSTRACT:
Disk drive self-servo writing includes transferring a reference pattern by magnetic printing onto a reference disk, wherein the resulting printed reference pattern includes embedded servo information that provides servo timing and head position information, installing the reference disk and a head into the disk drive, reading the printed reference pattern using the head to generate a readback signal, sampling the readback signal at a sampling rate to generate a sampled signal, processing the sampled signal waveform spectrum to generate a recovered signal including the embedded servo information and fundamental and higher harmonics of the sampled signal, using the embedded servo information from the recovered signal to precisely position and maintain the head at concentric tracks of the reference disk, and self-writing servo patterns onto the tracks with the head.

REFERENCES:
patent: 5012363 (1991-04-01), Mine et al.
patent: 5668679 (1997-09-01), Swearingen et al.
patent: 6738205 (2004-05-01), Moran et al.
patent: 2002/0150179 (2002-10-01), Leis et al.
U.S. Appl. No. 09/903,445, filed Jul. 8, 2001, Moran et al.

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