Software Controlled Cell Bit-Density to Improve NAND Flash Lifetime

Hybrid flash architectures combine static partitions in Sing le 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.


Published in:
2012 49Th Acm/Edac/Ieee Design Automation Conference (Dac), 229-234
Presented at:
49th ACM/EDAC/IEEE Design Automation Conference (DAC)
Year:
2012
Publisher:
New York, Ieee
ISSN:
0738-100X
ISBN:
978-1-4503-1199-1
Keywords:
Laboratories:




 Record created 2013-02-27, last modified 2018-03-17


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