Method for controlling activation of disk drive motors

Details Method for controlling activation of disk drive motors Method for controlling activation of disk drive motors

1993-07-28

1996-01-30

Cabeca, John W.

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Starting and/or stopping

318452, 318625, 364569, 364143, 360 7809, H02P 154, G05B 1101

Patent

active

054882745

ABSTRACT:
In a method of controlling activation of a motor, based on a device number (unit address) set value A.sub.d which is determined exclusively for a disk device and a motor activation start time delay T.sub.d which is designated by a host control device, a motor activation start time T.sub.s which corresponds to the physical device number is calculated in the disk device. The motor activation start time delay T.sub.d is set as a command in an interface between the disk device and the host control device. The method also requires that a nonvolatile memory is disposed in the disk device. The motor activation start time delay T.sub.d is stored in the nonvolatile memory when designated. In controlling activation of the motor later, the motor activation start time T.sub.s is calculated from the information which is stored in the nonvolatile memory.

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patent: 5272386 (1993-12-01), Kephart

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