Method and apparatus for controlling assertion of a write inhibi

Details Method and apparatus for controlling assertion of a write inhibi Method and apparatus for controlling assertion of a write inhibi

1995-05-25

1996-10-29

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

General recording or reproducing

Recording-or erasing-prevention

360113, 360 7702, G11B 1504, G11B 1904, G11B 5127, G11B 533

Patent

active

055702449

ABSTRACT:
A method for controlling assertion of a write inhibit signal in a disk drive is described. The disk drive comprises at least one rotating disk having data recording surfaces, and a head for each recording surface. Each head is mounted by an actuator for selective positioning of the head over the respective disk surface. Each disk surface includes data tracks. The method comprises the steps of calculating and storing a write inhibit threshold value for each head in the disk drive, performing a track following operation to determine position of a preselected head relative to a preselected data track, retrieving the write inhibit threshold value for the preselected head, comparing the determined head position to the retrieved write inhibit threshold value and asserting a write inhibit signal upon a certain relationship between the determined head position and the retrieved write inhibit threshold value.

REFERENCES:
patent: 5233487 (1993-08-01), Christensen et al.
patent: 5270880 (1993-12-01), Ottesen et al.
patent: 5434733 (1995-07-01), Hesterman et al.
patent: 5521772 (1996-05-01), Lee et al.

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