Magnetic disk storage system

Details Magnetic disk storage system Magnetic disk storage system

2006-05-30

2006-05-30

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

C360S070000, C360S075000

Reexamination Certificate

active

07054089

ABSTRACT:
The present invention provides a magnetic disk storage system including a spindle motor that rotates a magnetic disk, a spindle motor drive circuit that rotatably drives the spindle motor, a magnetic head that performs reading of information on the magnetic disk, a voice coil motor that moves the magnetic head, and a voice coil motor drive circuit that drives the voice coil motor. When the magnetic head is loaded from a standby position to the surface of the magnetic disk, the rotational speed of the spindle motor is made slower than a rotational speed at a normal operation. Upon power-off, the spindle motor drive circuit is caused to carry out a stepup converter operation to thereby generate a voltage higher than a back electromotive voltage, and causes a control circuit and a drive circuit to operate by the high voltage to thereby enable speed control at the movement of the magnetic head to a predetermined standby position.

REFERENCES:
patent: 5455496 (1995-10-01), Williams et al.
patent: 5754355 (1998-05-01), Nakamura et al.
patent: 6243222 (2001-06-01), Boutaghou et al.
patent: 6285521 (2001-09-01), Hussein
patent: 6396652 (2002-05-01), Kawachi et al.
patent: 7-14331 (1994-05-01), None

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