| CPC G11C 29/44 (2013.01) [G06F 11/2094 (2013.01); G11C 29/38 (2013.01); G06F 2201/82 (2013.01); G11C 2029/0409 (2013.01)] | 23 Claims |
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1. A data storage apparatus, comprising:
a non-volatile memory, wherein:
the non-volatile memory includes a block comprising N wordlines physically partitioned on the block into a first sub-block and a second sub-block;
the first sub-block comprises a first subset of the N wordlines; and
the second sub-block comprises a second subset of the N wordlines different than the first subset; and
one or more processors, individually or in combination, configured to:
determine whether a failure has been detected in the first sub-block;
in response to determining that the failure has been detected in the first sub-block:
mark the second sub-block with an initial designation as a defective sub-block;
perform at least one test on the second sub-block to determine a usability of the second sub-block; and
mark, based on the at least one test, the second sub-block with a second designation that is one of a tested usable sub-block or a tested defective sub-block; and
in response to determining that the failure has not been detected in the first sub-block:
refrain from marking the second sub-block with the initial designation as a defective sub-block.
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