The Design And Practice Of Embedded Linux File System

Embedded file system is playing an important role of the Embedded Operating System. Because of unstable power supply as well as the requirements on peculiarity of Embedded store medium and security in mobile applications higher and higher, the application of embedded system becomes wider than before. Therefore, the role of file system in the embedded system is critical.The design of Embedded System Linux evolves steadily and fast. After analyzing the traditional Linux file system and some popular embedded file system, this paper presents a schema of Embedded Linux File System. Then, we transplant an embedded Linux on a hand-held device and illustrate some practice of a Flash file system based on an MTD device. Since the storage capacity of embedded device is quite limited, we simplify the VFS and the physical file system so that this Embedded Linux File System can adapt to the embedded device better.We have modified, significantly and effectively, the Embedded Linux File System on an existing platform. On basis of the work that we have done, much more effort will be taken to make this file system schema more sophisticated so that we can provide effective technologic support for further expedition in this field.