Data recording/reproducing apparatus having recording head posit

Details Data recording/reproducing apparatus having recording head posit Data recording/reproducing apparatus having recording head posit

1990-07-03

1993-05-04

Smith, Jerry

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 60, 360 7705, G11B 555, G11B 1904

Patent

active

052087115

ABSTRACT:
In a head driving control apparatus used, for example, in a hard disc drive, a peak detector detects a peak value of a servo signal output from a data head. A CPU detects a thermal off-track distance L of the data head, on the basis of the peak value of the servo signal. When the thermal off-track distance L is within an allowable off-track distance Lw in a data write mode or within an allowable off-track distance Lc in a data read mode, the CPU enables a data write operation or a data read operation. When the thermal off-track distance L is without the allowable off-track distance Lw in the data write mode or without the allowable off-track distance Lc in the data read mode, the CPU prohibits the data write operation or the data read operation.

REFERENCES:
patent: 4803572 (1989-02-01), Haruna et al.
patent: 4839751 (1989-06-01), Revels
patent: 5005089 (1991-04-01), Thanos et al.
patent: 5095471 (1992-03-01), Sidman

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