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DATA STORAGE DEVICE AND OPERATING METHOD THEREOF

  • US 20190310923A1
  • Filed: 10/19/2018
  • Published: 10/10/2019
  • Est. Priority Date: 04/06/2018
  • Status: Active Grant
First Claim
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1. A data storage device comprising:

  • a nonvolatile memory device including a first system data block and a second system data block as a duplicate of the first system data block; and

    a controller configured to control the nonvolatile memory device,wherein, when the data storage device is powered on after a sudden power off (SPO), the controller detects an erased page by scanning, without decoding, performs simple decoding for first system data of first system pages preceding the erased page, and, if the simple decoding fails, recovers the first system data by reading out second system data from second system pages, corresponding to the first system pages, of the second system data block.

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