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Issue No.12 - Dec. (2013 vol.62)
pp: 2503-2515
Yuan-Hao Chang , Academia Sinica, Taipei
Po-Chun Huang , National Taiwan University, Taipei
Pei-Han Hsu , National Taiwan University, Taipei
Lue-Jane Lee , National Taiwan University, Taipei
Tei-Wei Kuo , National Taiwan University , Taipei
David Hung-Chang Du , University of Minnesota, Minneapolis
In recent years, reliability has become one critical issue in the designs of flash-memory file/storage systems, due to the growing unreliability of advanced flash-memory chips. In this paper, a version-based design is proposed to effectively and efficiently maintain the consistency among page versions of a file for potential recovery needs. In particular, a two-version one for a native file system is presented with the minimal overheads in version maintenance. A recovery scheme is then presented to restore a corrupted file back to the latest consistent version. The design is later extended to maintain multiple data versions with the considerations of the write constraints of multilevel-cell flash memory. It was shown that the proposed design could significantly improve the reliability of flash memory with limited management and space overheads.
Storage management, Error correction codes, Flash memory, Reliability engineering, Computer architecture, Queueing analysis,queue, Flash memory, ECC, Poisson distribution, binomial distribution, file system, MLC, YAFFS, forward copying, recovery, reliability, two version
Yuan-Hao Chang, Po-Chun Huang, Pei-Han Hsu, Lue-Jane Lee, Tei-Wei Kuo, David Hung-Chang Du, "Reliability Enhancement of Flash-Memory Storage Systems: An Efficient Version-Based Design", IEEE Transactions on Computers, vol.62, no. 12, pp. 2503-2515, Dec. 2013, doi:10.1109/TC.2012.131
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