Software controlled cell bit-density to improve NAND flash lifetime
DAC(2012)
摘要
Hybrid flash architectures combine static partitions in Single Level Cell (SLC) mode with partitions in Multi Level Cell (MLC) mode. Compared to MLC-only solutions, the former exploits fast and short random writes while the latter brings large capacity. On the whole, one achieves an overall tangible performance improvement for a moderate extra cost. Yet, device lifetime is an important aspect often overlooked. In this paper, we show how a dynamic SLC-MLC scheme provides significant lifetime improvement (up to 10 times) at no cost compared to any classic static SLC-MLC partitioning based on any state of the art Flash Translation Layer policy.
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关键词
mlc-only solution,significant lifetime improvement,static partition,overall tangible performance improvement,moderate extra cost,classic static slc-mlc,nand flash lifetime,device lifetime,cell bit-density,dynamic slc-mlc scheme,single level cell,multi level cell,programming,resource management,flash translation layer,computer architecture,benchmark testing
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