Method and apparatus for choosing storage components within a tier
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United States of America Patent
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Dec 6, 2016
Grant Date -
Oct 13, 2011
app pub date -
Oct 5, 2010
filing date -
Apr 13, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A method for a storage controller to write a data block to one of a plurality of storage components is provided. The storage controller receives a write request from a host computer, and determines at least a portion of the data block includes a Logical Block Address (LBA) that is not currently mapped to a physical page of storage. The storage controller calculates availability for each storage component within the plurality of storage components, and selects the storage component with a highest calculated availability from the plurality of storage components. The storage controller next determines a next available physical page within the selected storage component. Finally, the storage controller writes the at least a portion of the data block including LBAs that are not currently mapped to a physical page of storage to the next available physical page.
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