Disk device, disk eccentricity control method, and recording...

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

Reexamination Certificate

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Reexamination Certificate

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10510494

ABSTRACT:
Weight factors corresponding to plural areas into which a disk is concentrically divided, respectively, are previously stored, and an amount of eccentricity control is calculated using the previously-stored weight factors during settling operation. Further, when an impact larger than a predetermined value is applied, calculation of weight factors is stopped. Thereby, the seek time can be shortened, and positioning of the head can be stabilized.

REFERENCES:
patent: 6768705 (2004-07-01), Hirai
patent: 6894862 (2005-05-01), Kusumoto
patent: 6947243 (2005-09-01), Dang et al.
patent: 2-42691 (1990-02-01), None
patent: 2-246063 (1990-10-01), None
patent: 11-39814 (1999-02-01), None
patent: 2001-189063 (2001-07-01), None
patent: 2002-230928 (2002-08-01), None
patent: 2003-123415 (2003-04-01), None

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