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Data reliability information in a non-volatile memory device

  • US 10,459,793 B2
  • Filed: 03/17/2016
  • Issued: 10/29/2019
  • Est. Priority Date: 03/17/2016
  • Status: Active Grant
First Claim
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1. A data storage device comprising:

  • a non-volatile memory array comprising a plurality of dies, wherein each die of the plurality of dies includes a plurality of words; and

    a controller coupled to the non-volatile memory array, the controller includes a writes module including a data management module, and address translation module, a read module, and a maintenance module, wherein the controller is configured to;

    store user data to of at least a first die and a second die of the plurality of dies;

    store parity data to a first portion of a third die of the plurality of dies; and

    store metadata to a second portion of the third die, wherein the metadata stored to the second portion of the third die is self-correctable, the non-volatile memory array further comprises a RAID die associated with the plurality dies, wherein the controller is further configured to;

    detect errors using parity data in the self-correctable metadata stored to the second portion of the third die;

    responsive to detecting errors in the self-correctable metadata, correct the errors using parity data in the self-correctable metadata stored to the second portion the third die;

    generate redundancy data by performing an XOR operation of the third die, the first die, and second die; and

    store, to the RAID die, the redundancy data.

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