【摘要】 <正> 1.引言随着计算机技术的发展,嵌入式系统已成为计算机领域的一个重要组成部分。对嵌入式系统来说,不可预知的非正常断电随时可能发生。对于传统的文件系统来说,非正常的断电会带来文件系统的不一致性,导致文件系统的破坏,严重的时候甚至会导致信息的大量丢失。因此,在嵌入式存储设备上,实现一种特殊的防断电文件系统具有特别重要的意义。JFFS日志文件系统正是这样一种在嵌入式存储设备Flash上设计并实现的防断电的文件系统。下面我们将重点讨论JFFS的设计原理和它在特殊的Flash设备DiskOnChip上的实现。更多还原

【Abstract】 In embedded systems,unexpected power-off often causes the corruption of the file system and the lose of data. It is necessary to develop a special kind of file system to prevent such corruption. As a kind of journaling file system specially for embedded memory devices,JFFS is just the files system we need. In order to make use of JFFS more extensively, Redflag Software Ltd. Co. has successfully solved the problem about JFFS’ implementation on DiskOnChip,a special kind of embedded memory device. This paper mostly discusses the design of JFFS and its implementation on DiskOnChip.更多还原