YAFFS is a log-structured filesystem. It is designed particularly for NAND (as opposed to NOR) flash, to be flash-friendly, robust due to journalling, and to have low RAM and boot time overheads. File data is stored in 'chunks'. Chunks are the same
本u-boot由本人调通,cpu为s3c2440,开发板pw2440,支持nand启动、读、写,支持yaffs2文件系统下载,支持DM9000A网卡,TFTP下载,引导linux内核,最大特色是支持USB下载内核和文件系统,使你的调试变得快捷方便,复杂的指令也被本人简化,例如下载内核只需要:y k 就可以通过USB下载到nand flash里面。强大功能你自己慢慢感受吧