Disk apparatus using constant linear velocity method and having

Details Disk apparatus using constant linear velocity method and having Disk apparatus using constant linear velocity method and having

1995-03-15

1996-12-31

Hindi, Nabil

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369116, 369 57, G11B 700

Patent

active

055901050

ABSTRACT:
A disk apparatus using a CLV method is provided in which disk apparatus a power consumption is reduced by providing a power save mode in which an operation of a head driving system is stopped during a standby state. The disk apparatus uses a constant linear velocity method by which method a recording/reproducing operation of information on a disk is performed while the disk is rotated at a variable speed so that the linear velocity of the head relative to the disk is maintained to be constant. A disk driving unit rotates the disk, and a head driving unit drives the head. A linear velocity controlling unit controls a rotational speed of the disk so that the linear velocity of the head relative to the disk is maintained to be constant. A constant rotational speed controlling unit rotates the disk at a constant rotational speed. A switching unit switches a control of the disk driving unit to be performed by either one of the linear velocity controlling unit and the constant rotational speed controlling unit. A stopping unit stops an operation of the head driving unit while the disk driving unit is controlled by the constant rotational speed controlling unit.

REFERENCES:
patent: 4623939 (1986-11-01), Machida et al.
patent: 4723235 (1988-02-01), Yasuda et al.
patent: 4766502 (1988-08-01), Mashimo
patent: 5051976 (1991-09-01), Kawano et al.
patent: 5243587 (1993-09-01), Itoh et al.
patent: 5420841 (1995-05-01), Hwang
patent: 5442608 (1995-08-01), Umeda et al.

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