基于嵌入式的文件系统研究

File System Research Based on Embedding

为解决传统FAT格式文件数据按顺序存取方式无法适应在大容量存储设备中大规模目录文件的读取查询操作等问题,在嵌入式文件系统中采用磨损平衡算法及位图存储技术对NandFlash存储介质实现Flash域磨损优化,并对嵌入式文件系统的索引存储和空闲目录进行优化管理。系统使用仿真器进行仿真程序开发,并在基于ARM9的MagicARM2410开发板进行仿真实验。实验结果表明,该文件系统能实现其基本功能,其可行性得到验证。

To solve the problem that traditional FAT format file data access method is unable to adapt to the query operations of the large-scale catalog file in large-scale mass storage device as the traditional data access method of FAT format file is sequential access, the wear-leveling algorithm is proposed, optimizing wear block of flash in NandFlash storage medium using bitmap storage technology is realized, and memory index and idle directory of an embedded file system are optimized. A simulation program is developed, and simulation experiments are carried out based on ARM9 MagicARM2410 board. The result shows that the basic functions of the file system can be realized, and the feasibility is verified.