Data storage device, control device, off-track control...

Details Data storage device, control device, off-track control... Data storage device, control device, off-track control...

2006-04-25

2006-04-25

Wong, K. (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077030

Reexamination Certificate

active

07035034

ABSTRACT:
A hard disk device includes a servo control unit that constitutes a servo loop for a head seek for performing read/write of data from/to a recording medium, a correction signal generation unit for generating a correction signal for correcting a control by the servo control unit based on an output of a predetermined sensor, and a correction signal control unit for estimating an effect of supplying the correction signal to the servo loop and for controlling whether or not the correction signal is to be supplied to the servo loop in response to a result of the estimation. Moreover, the gain of the sensor is dynamically controlled in response to the above estimation result.

REFERENCES:
patent: 4297734 (1981-10-01), Laishley et al.
patent: 5426545 (1995-06-01), Sidman et al.
patent: 6115200 (2000-09-01), Allen et al.
patent: 6212026 (2001-04-01), Ohmi et al.
patent: 6496320 (2002-12-01), Liu
patent: 6674600 (2004-01-01), Codilian et al.

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