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EMSOFT
2009
Springer

Adding aggressive error correction to a high-performance compressing flash file system

10 years 4 months ago
Adding aggressive error correction to a high-performance compressing flash file system
While NAND flash memories have rapidly increased in both capacity and performance and are increasingly used as a storage device in many embedded systems, their reliability has decreased both because of increased density and the use of multi-level cells (MLC). Current MLC technology only specifies the minimum requirement for an error correcting code (ECC), but provides no additional protection in hardware. However, existing flash file systems such as YAFFS and JFFS2 rely upon ECC to survive small numbers of bit errors, but cannot survive the larger numbers of bit errors or page failures that are becoming increasingly common as flash file systems scale to multiple gigabytes. We have developed a flash memory file system, RCFFS, that increases reliability by utilizing algebraic signatures to validate data and Reed-Solomon codes to correct erroneous or missing data. Our file system allows users to adjust the level of reliability they require by specifying the number of redundancy ...
Yangwook Kang, Ethan L. Miller
Added 26 May 2010
Updated 26 May 2010
Type Conference
Year 2009
Where EMSOFT
Authors Yangwook Kang, Ethan L. Miller
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