IP & T Group LLP
Data storage apparatus and operating method thereof
A data storage apparatus includes a nonvolatile memory device and a controller configured to decode on normal read data read from a target memory cell, calculate a standard deviation of history read voltages for a target memory block including the target memory cell when the decoding of the normal read data fails, compare the calculated standard deviation with a preset first threshold value and a preset second threshold value, and determine a decoding type and a decoding order for the target memory cell based on a comparison result.
SK hynix Inc.
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Seon Ju
Lee