Data storage device and operating method thereof
AssigneeSK hynix Inc.
InventorMin Kee KIM
Life of this patent
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Abstract
A data storage device includes a nonvolatile memory device including word lines each including one or more pages; and a controller suitable for, in the case where recovery is made to a normal state from a power-off state, searching a word line including an erased page among the word lines, and selecting, when all pages of the word line including the erased page are erased pages, the corresponding word line as a reliability verification word line.
Claims20
A data storage device comprising:
- a nonvolatile memory device including word lines each corresponding to one or more pages;
- and
- a controller suitable for performing a reliability verification to a reliability verification word line among the word lines when the data storage device is recovered from a sudden power-off,
- wherein the reliability verification word line is a word line, all pages corresponding to which are erased pages,
- wherein the reliability verification word line is a word line identified as erased, and
- wherein the controller performs the reliability verification to determine whether the reliability verification word line identified as erased is actually in an erase state or in a program-interrupted state.
A method for operating a data storage device including a nonvolatile memory device which includes word lines each corresponding to one or more pages, the method comprising:
- selecting a reliability verification word line among the word lines when the data storage device is recovered from a sudden power-off;
- and
- performing a reliability verification to the reliability verification word line,
- wherein the reliability verification word line is a word line, all pages corresponding to which are erased pages,
- wherein the reliability verification word line is a word line identified as erased, and
- wherein the performing of the reliability verification is determining whether the reliability verification word line identified as erased is actually in an erase state or in a program-interrupted state.
A data processing system comprising a host operatively coupled to a data storage device, the data storage device comprising:
- a nonvolatile memory device including a plurality of word lines each word line including one or more pages;
- and
- a controller suitable for, in the case where recovery is made to a normal state from a power-off state, searching a word line including an erased page among the word lines, and selecting, when all pages of the word line including the erased page are erased pages, the corresponding word line as a reliability verification word line,
- wherein the reliability verification word line is a word line identified as erased, and
- wherein the controller performs a reliability verification to the reliability verification word line to determine whether the reliability verification word line identified as erased is actually in an erase state or in a program-interrupted state.
Dependencies are inferred from the claim text.