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Logical-to-Physical Address Translation for Solid State Disks

  • US 20110072194A1
  • Filed: 12/21/2009
  • Published: 03/24/2011
  • Est. Priority Date: 09/23/2009
  • Status: Active Grant
First Claim
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1. A method of transferring data between one or more sectors of a storage device and an external device, the sectors of the storage device organized into blocks and superblocks, the method comprising:

  • at a flash translation layer;

    mapping a physical address in the storage device to a logical sector address, wherein the logical sector address corresponds to mapping data comprising;

    i) a page index, ii) a block index, and iii) a superblock number of the storage device;

    storing the mapping data in at least one summary page corresponding to the superblock containing the physical address;

    storing one or more page offsets of an active block in the superblock in at least one active block table corresponding to the superblock;

    storing a block index and a page index of the at least one summary page and an address of the at least one active block table, for each superblock of the storage device, in a page global directory corresponding to the storage device.

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