Slides fom YAFFS - A NAND-flash filesystem. This was presented at FOSDEM 2004 (February 23rd), as part of the Embedded Track, and describes the YAFFS filesystem - its origins, how it works, explains the differences between NAND and NOR flash and thus why a specialised NAND-flash filesystem is appropriate. It also covers embedded-system use with Yaffs Direct, presents some performance stats, and a comparison with JFFS2, and looks at supporting next-generation NAND with YAFFS2.