Boots – shoes – and leggings
Patent
1994-12-02
1997-04-01
Voeltz, Emanuel T.
Boots, shoes, and leggings
364186, 369 53, G11B 2736
Patent
active
056173393
ABSTRACT:
A method and apparatus for detecting degradation in data storage system spindle motor performance is disclosed. A duration of time required for the spindle motor to transition between an initial velocity and a test velocity is determined at or near the time of data storage system manufacture and periodically during the service life of the spindle motor. Deviations between the manufacturing and in-service time durations are computed and, depending on the magnitude of the deviation, invoke particular data storage system responses. The in-service time duration procedure is preferably performed when spindle motor power is removed, typically during a power-down or power-saving sequence.
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International Business Machines Corpoation
Pipala Edward
Voeltz Emanuel T.
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