| CPC G11C 16/3495 (2013.01) [G11C 16/16 (2013.01); G11C 16/26 (2013.01); G11C 29/72 (2013.01)] | 19 Claims |
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1. A storage device comprising:
a non-volatile memory including a plurality of physical blocks;
a controller configured to group the plurality of physical blocks into a plurality of super blocks including a first super block that includes a first physical block and a second physical block at a first time period, and configured to perform a read operation on the first physical block based on a first read level; and
a first buffer configured to store a read level based on the first read level of the first physical block when the read operation on the first physical block based on the first read level is successfully performed and otherwise store the read level based on a second other read level,
wherein when the controller detects that the second physical block is defective based on a result of performing the read operation on the second physical block using the stored read level, the controller replaces the second physical block with a third physical block that is not included in any of the plurality of super blocks, and the third physical block has equal or similar electrical characteristics as physical blocks included in the first super block,
wherein the second read level is offset from the first read level based on a difference in electrical characteristics between the first physical block and the second physical block.
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