Distributed storage network including memory diversity
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United States of America Patent
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Oct 14, 2014
Grant Date -
Oct 18, 2012
app pub date -
Jun 21, 2012
filing date -
Sep 29, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A dispersed storage (DS) unit includes a processing module and a plurality of hard drives. The processing module is operable to maintain states for at least some of the plurality of hard drives. The processing module is further operable to receive a memory access request regarding an encoded data slice and identify a hard drive of the plurality of hard drives based on the memory access request. The processing module is further operable to determine a state of the hard drive. When the hard drive is in a read state and the memory access request is a write request, the processing module is operable to queue the write request, change from the read state to a write state in accordance with a state transition process, and, when in the write state, perform the write request to store the encoded data slice in the hard drive.
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