介绍yaffs文件系统的制作过程，主要需要nand flash驱动的支持。-Yaffs file system, introduced the production process, mainly driven by the need to support nand flash.

The Numonyx™ Sector-based Compact File System (SCFS) is an embedded file system that manages Numonyx NAND flash memories, MultiMediaCard™ (MMC) devices and Secure Digital (SD) cards with the File Allocation Table (FAT) file system for