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Flash memory is small size, lightweight, shock-resistant, nonvolatile, and consumes little power. Flash memory therefore shows promise for use in storage devices for consumer electronics, mobile computers, wireless devices and embedded systems. However, flash memory cannot be overwritten unless erased in advance. Erase operations are slow that usually decrease system performance and consume power. The number of erase cycles is also limited, and a single worn-out block affects the usefulness of entire flash memory device. Therefore, for power conservation, better system performance and longer flash memory lifetime, system support for erasure management is necessary. In this paper, the authors propose a novel idea of system software for garbage collection and wear-leveling called Allocation of Memory Intellectually for NAND flash memories.
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