Method for correcting offset in a magnetic disk including appare

Details Method for correcting offset in a magnetic disk including appare Method for correcting offset in a magnetic disk including appare

1994-12-23

1997-02-25

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7704, G11B 5596

Patent

active

056064691

ABSTRACT:
A method for writing a servo pattern in a hard disk device comprises the steps of reproducing a first servo signal from a servo surface, recording a second servo pattern on a recording surface using a data head by controlling the data head on a track defined on the recording surface, reproducing a second servo signal from the recording surface in response to the second servo pattern recorded thereon using the data head, detecting an off-track of the data head with respect to the predetermined track on the recording surface; shifting the data head in a radial direction of the recording surface with an offset such that the off-track is canceled, and recording a third servo pattern on the recording surface using the data head at a position determined in the step of shifting the data head.

REFERENCES:
patent: 4620243 (1986-10-01), Bakken et al.
patent: 5050016 (1991-09-01), Squires
patent: 5073833 (1991-12-01), Best et al.
patent: 5185681 (1993-02-01), Volz et al.
patent: 5220468 (1993-06-01), Sidman

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