Storage Device Power Management
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United States of America Patent
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app pub date -
May 26, 2015
filing date -
May 6, 2011
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Abandoned
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Abstract
Techniques for storage device power management are described that enable coordinated buffer flushing and power management for storage devices. In various embodiments, a power manager can coordinate the flushing of pending or “dirty” data from multiple buffers of a computing device in order to reduce or eliminate interleaved (e.g., uncoordinated) data operations from the multiple buffers that can cause shortened disk idle periods. By so doing, the power manager can selectively manage power states for one or more power-managed storage devices to produce longer idle periods. For example, information regarding the status of multiple buffers can be used in conjunction with analysis of historical I/O patterns to determine appropriate times to spin down a disk or allow the disk to keep spinning. Additionally, user-presence information can be utilized to tune the aggressiveness of buffer coordination and state transitions for power-managed storage devices to improve performance.
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