Title:
磁気ディスク記憶システム
Document Type and Number:
Japanese Patent JP4180357
Kind Code:
B2
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.
Inventors:
Yasuhiko Kogami
Application Number:
JP2002340338A
Publication Date:
November 12, 2008
Filing Date:
November 25, 2002
Export Citation:
Assignee:
Renesas Technology Corp.
International Classes:
G11B21/12; G11B5/54; G11B5/55; G11B19/22; G11B21/02
Domestic Patent References:
| JP2001250351A | ||||
| JP7073621A | ||||
| JP6150592A |
Attorney, Agent or Firm:
Shizuyo Tamamura