YAFFS stands for “yet another flash file system”(*). As far as I am aware, YAFFS is the only file system, under any operating system, that has been designed specifically for use with NAND flash. YAFFS is thus designed to work within the constraints of, and exploit the features of, NAND flash to maximise performance. YAFFS uses journaling, error correction and verification techniques tuned to the way NAND typically fails, to enhance robustness. The result is a file system that exploits low-cost NAND chips and is both fast and robust. YAFFS is highly portable and runs under Linux, ucLinux and Windows CE. YAFFS is an open source project.
The initial specification for Yaffs version 2. Describes the development of Yaffs to deal with next-generation NAND chips which have larger (2Kb) pages and don’t allow page rewrites. This newer design is be significantly faster (write: 1.5x-5x, delete: 4x, garbage collection: 2x) and has 25-50% lower RAM footfrint.
The initial specification for Yaffs. Circa 2002. Details of the filing system, including short backgrounder. Read this if you want to know what it is, what it does and how it works. This specification does not cover Yaffs2.
Attached is a PDF with slides from the Yaffs talk at CELF’s Embedded Linux Conference Europe 2007. If you are able to view Ogg Theora video files, the talk is also online. Ogg Theora is a Free video format. Free players are available for all platforms. See the list here. If in doubt, VLC is probably available for your operating system.