Efficient drive-level estimation of written-in servo position er

Details Efficient drive-level estimation of written-in servo position er Efficient drive-level estimation of written-in servo position er

1998-01-30

2000-09-05

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 5596

Patent

active

06115203&

ABSTRACT:
The invention relates to a disk drive servo apparatus, and method for implementing the same, that maintains a transducer on a substantially non-perturbed path despite the fact that the tracks were written in a perturbed manner by a servo track writer. The invention utilizes a non-causal filter to determine servo track writer repetitive run-out (STW.sub.-- RRO) values for each sector of each track at the drive level. The STW.sub.-- RRO values are stored, preferably in their respective servo sectors on the surface of the disk, for use during track following operations. During read and write operations, the STW.sub.-- RRO values are retrieved from storage and are used to generate position error signals necessary to maintain the transducer on the desired path.

REFERENCES:
patent: 4412165 (1983-10-01), Case et al.
patent: 5270885 (1993-12-01), Satoh et al.
patent: 5404253 (1995-04-01), Painter
patent: 5608586 (1997-03-01), Sri-Jayantha et al.
patent: 5822147 (1998-10-01), Kisaka
patent: 5825578 (1998-10-01), Shrinkle et al.
patent: 5854722 (1998-12-01), Cunningham et al.
patent: 5886846 (1999-03-01), Pham et al.
patent: 5926338 (1999-07-01), Jeon et al.

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