Method for detection of slider-disk contact

Details Method for detection of slider-disk contact Method for detection of slider-disk contact

1995-11-08

1998-04-21

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7303, 324212, 324210, 369 50, G11B 2102, G01R 3312

Patent

active

057424462

ABSTRACT:
A method for testing slider/disk contact in a disk drive is described. The disk drive comprises a rotating disk having tracks and a head mounted by an actuator for selective positioning of the head over any one of the tracks of the disk. The head includes a slider. The method comprises the steps of positioning the head at each of a preselected set of tracks, while at each one of the preselected set of tracks, rotating the disk of the disk drive at a preselected rotational velocity and using the head of the disk drive, at each track, to write a signal having a substantially uniform pattern on the disk as it rotates. Thereafter, rotating the disk at a fixed preselected rotational velocity, and while rotating at the fixed preselected rotational velocity, using the head to read back the signals written at each one of the preselected set of tracks. The read back signals are used to determine rotational velocities at which slider/disk contact occurs.

REFERENCES:
patent: 5410439 (1995-04-01), Egbert et al.
patent: 5545989 (1996-08-01), Tian et al.

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