Scalable storage devices
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United States of America Patent
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Aug 25, 2015
Grant Date -
Sep 11, 2014
app pub date -
Mar 4, 2014
filing date -
Jun 18, 2010
priority date (Note) -
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Abstract
Techniques using scalable storage devices represent a plurality of host-accessible storage devices as a single logical interface, conceptually aggregating storage implemented by the devices. A primary agent of the devices accepts storage requests from the host using a host-interface protocol, processing the requests internally and/or forwarding the requests as sub-requests to secondary agents of the storage devices using a peer-to-peer protocol. The secondary agents accept and process the sub-requests, and report sub-status information for each of the sub-requests to the primary agent and/or the host. The primary agent optionally accumulates the sub-statuses into an overall status for providing to the host. Peer-to-peer communication between the agents is optionally used to communicate redundancy information during host accesses and/or failure recoveries. Various failure recovery techniques reallocate storage, reassign agents, recover data via redundancy information, or any combination thereof.
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