Disk drive, load/unload unit, and control method thereof

Details Disk drive, load/unload unit, and control method thereof Disk drive, load/unload unit, and control method thereof

1998-06-08

2000-10-17

Loomis, Paul

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

714 24, 711161, G11B 2102

Patent

active

061340715

ABSTRACT:
The present invention provides a disk drive, a load/unload unit, and a control method thereof which are capable of reliably unloading a head slider from a disk when power is turned off and enhancing reliability. A disk drive is equipped with a VCM spindle driver for rotating a disk, a magnetic head, an actuator mechanism for moving over the surface of the magnetic disk or to an evacuating position a head slider having the magnetic head, a ramp block, and a CPU/HDC (control means) for performing control of load and unload operations, speed control of the actuator mechanism, and control of an operation of reading or writing data from or to the disk. The CPU/HDC receives a specific command issued from the host immediately before power is turned off, and executes this command, then executes unload control, and notifies the host of command completion after the unload control has been completed.

REFERENCES:
patent: 4757505 (1988-07-01), Marrington et al.
patent: 5345347 (1994-09-01), Hopkins et al.
patent: 5715424 (1998-02-01), Jesionowski

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