System for controlling disk drive by varying disk rotation speed when buffered data is above high or below low threshold for predetermined damping period
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United States of America Patent
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-
Aug 19, 1997
Issued Date -
N/A
app pub date -
Nov 8, 1995
filing date -
Oct 11, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A disk drive motor control system which dynamically varies the speed of the motor in accordance with the desired data transfer rate is provided. This is accomplished by monitoring the transfer rate and lowering the speed when the transfer rate decreases and then raising the speed when the transfer rate increases. Hysteresis is preferably built-in so that rapid oscillations between the two speeds do not occur.
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