Adaptive control of head velocity during data storage device startup
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United States of America Patent
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Jun 2, 2009
Grant Date -
Dec 28, 2006
app pub date -
Jun 28, 2005
filing date -
Jun 28, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A control method is provided for loading a data transfer head to a data storage medium comprising: determining a desired maximum displacement between a parked position of the head and an encroaching position of the head in relation to a selected data storage track of the medium; determining a spin interval associated with a predetermined quantity of medium movement before the head reaches the encroaching position; rotating the data storage medium at a beginning of the spin interval; and moving the actuator during the spin interval from the parked position and at a velocity resulting in the head being displaced at the end of the spin interval a distance that is less than the maximum displacement. A data storage device is contemplated comprising programmed instructions for performing this method for a predetermined number of loading occurrences, or in relation to observing a threshold data transfer error rate.
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