Disk drive and controlling method thereof

Details Disk drive and controlling method thereof Disk drive and controlling method thereof

2008-10-23

2010-12-28

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077040

Reexamination Certificate

active

07859787

ABSTRACT:
Embodiments of the present invention provide a disk drive capable of appropriately measuring non-linearity in a head position control system, and a control method therefore. According to one embodiment, a magnetic disk drive inputs a reference signal SRinto a voice coil motor, inputs into the voice coil motor a control signal SCin which a harmonic component resulting from the reference signal SRis suppressed, and measures an error signal PES that may be obtained in the state where the reference signal SRand the control signal SC, in which the harmonic component is suppressed, are input in the voice coil motor.

REFERENCES:
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patent: 5835300 (1998-11-01), Murphy et al.
patent: 5923491 (1999-07-01), Kisaka et al.
patent: 6674589 (2004-01-01), Min et al.
patent: 7315430 (2008-01-01), Kisaka
patent: 11-297013 (1999-10-01), None

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