Efficient re-read operations from memory devices

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United States of America Patent

PATENT NO 8225181
APP PUB NO 20090144600A1
SERIAL NO

12323544

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method for data storage includes storing data, which is encoded with an Error Correction Code (ECC), in a group of analog memory cells by writing respective first storage values to the memory cells in the group. After storing the data, respective second storage values are read from the memory cells in the group, and the read second storage values are processed so as to decode the ECC. Responsively to a failure in decoding the ECC, one or more of the second storage values that potentially caused the failure are identified as suspect storage values. Respective third storage values are re-read from a subset of the memory cells that includes the memory cells holding the suspect storage values. The ECC is re-decoded using the third storage values so as to reconstruct the stored data.

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Patent Owner(s)

Patent OwnerAddress
APPLE INCONE APPLE PARK WAY CUPERTINO CA 95014

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Perlmutter, Uri Holon, IL 71 3114
Shalvi, Ofir Ra'anana, IL 138 9991
Sommer, Naftali Rishon Le-Zion, IL 150 7538

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