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Data Management in Solid State Storage Devices

  • US 20120266050A1
  • Filed: 12/16/2010
  • Published: 10/18/2012
  • Est. Priority Date: 12/17/2009
  • Status: Active Grant
First Claim
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1. An apparatus comprising a solid state storage device in which a solid state storage in the solid state storage device comprises erasable blocks each erasable block comprising a plurality of data write locations, the apparatus comprising memory and control logic adapted to:

  • store input data in successive groups of data write locations, each group comprising write locations in a set of erasable blocks in each of a plurality of logical subdivisions of the solid state storage;

    error correction encode the input data such that each group contains an error correction code for the input data in that group;

    maintain, in the memory, metadata indicating the location of input data in the solid state storage;

    maintain an indication of validity of data stored in each data write location; and

    prior to erasing a block, recover valid input data from each group containing write locations in that block and re-store the recovered data as new input data.

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