In the existing NAND Flash file system ( such as the YAFFS ), a block both store the file attribute information and file data, the system must be scanned all of the Flash block when startup. 在现有的NANDFlash文件系统YAFFS中,一个块中(block)同时存放文件属性信息和文件数据,启动时要扫描完整个Flash中的块。