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This paper advocates a quasi-nonvolatile solid-state drive (SSD) design strategy for enterprise applications. The basic idea is to trade data retention time of NAND flash memory for other system performance metrics including program/erase (P/E) cycling endurance and memory programming speed, and meanwhile use explicit internal data refresh to accommodate very short data retention time (e.g., few weeks...
Today and future nand flash memory will heavily rely on system-level fault-tolerance techniques such as error correction code (ECC) to ensure the overall system storage integrity. Since ECC demands the storage of coding redundancy and hence degrades effective cell storage efficiency, it is highly desirable to use more powerful coding solutions that can maintain the system storage reliability at less...
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