FAT文件系统在NAND FLASH上的磨损均衡研究

提出一种应用于NAND FLASH上实现FAT文件系统磨损均衡的方法,通过保留已删除文件在FAT表中的表项和重写文件时将内容写入新簇的方式,实现对NAND FLASH的均衡使用.在牺牲一定读写速度的前提下,有效地实现了对NAND FLASH的均衡磨损,延长了NAND FLASH的使用寿命.在文件系统层研究磨损均衡,实现难度小,且对标准FAT文件系统兼容,具有一定的可行性和实用性.

The Research of Wear Leveling for FAT File System in NAND Flash Memory

This paper proposes two methods for wear leveling of FAT file system in NAND Flash memory,by keeping the corresponding item in FAT table for deleted file and writing data to new cluster when rewriting a file.These methods have achieved wear leveling efficiently and extended the life of NAND Flash memory at the expense of read and write speed.The research of wear leveling in file system level has less difficulty and compatible with FAT filel system,so it has feasibility and practical.