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Data storage system with dynamic erase block grouping mechanism and method of operation thereof

  • US 9,665,295 B2
  • Filed: 08/26/2016
  • Issued: 05/30/2017
  • Est. Priority Date: 08/07/2013
  • Status: Active Grant
First Claim
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1. A method of operation of a data storage system, the method comprising:

  • maintaining metadata for each erase block of a plurality of erase blocks in the data storage system, wherein a respective metadata for a respective erase block includes one or more characteristics of the respective erase block;

    allocating a set of erase blocks, of the plurality of erase blocks, as unassociated erase blocks; and

    forming a plurality of super blocks, including, for each super block to be formed;

    selecting two or more unassociated erase blocks in accordance with characteristics of the unassociated erase blocks so as to select unassociated erase blocks with similar characteristics, wherein said characteristics of the unassociated erase blocks, in accordance with which the two or more unassociated erase blocks are selected, include at least one characteristic selected from the group consisting of age information, bit error rate, wear statistics, and operation parameters;

    grouping the two or more selected erase blocks to form the super block;

    aggregating metadata from the two or more selected erase blocks; and

    storing the aggregated metadata as metadata for the super block.

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