Methodology for manipulation of SATA device access cycles
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United States of America Patent
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Jul 26, 2016
Grant Date -
Jan 3, 2008
app pub date -
Mar 30, 2006
filing date -
Mar 30, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
Controlling accesses to target devices such as disk drives by modifying the duty cycle profile of those devices to improve device reliability is disclosed. The utilization of a target device is monitored, and if a device is being overused, that device is given a rest period by reserving it for a special initiator that does not send any commands to the device for a certain period of time. This reduced utilization has the effect of increasing the reliability of the target device. This period of time also adds a delay to the processing of commands for the target device being overutilized so that the device becomes less responsive. This performance penalty creates pressure on system administrators to reduce the number of commands sent to that target device and/or move data to proper devices (that can handle the high number of accesses).
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