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Systems and Methods for Performing Defect Detection and Data Recovery in a Memory System

  • US 20140281682A1
  • Filed: 03/12/2013
  • Published: 09/18/2014
  • Est. Priority Date: 03/12/2013
  • Status: Active Grant
First Claim
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1. A method for performing defect detection and data recovery within a memory system, the method comprising:

  • in a controller of a memory system coupled to a host device;

    receiving a command to write data in a memory of the memory system;

    determining a physical location of the memory that is associated with the data write;

    writing data associated with the data write to the physical location of the memory;

    storing the physical location of the memory that is associated with the data write in a Flash Management Unit Tag cache (“

    Tag cache”

    );

    identifying a data keep cache of a plurality of data keep caches that is associated with the data write based on the physical location of the memory that is associated with the data write;

    updating an XOR sum stored in the identified data keep cache based on the data of the data write and the XOR sum that is stored in the identified data keep cache; and

    storing the updated XOR sum in the identified data keep cache.

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