模拟linux文件系统写的程序，比较简单。该文件系统物理基础为磁道（40）0~39道。每个磁道划分为8个扇区，每个扇区有512B。该文件系统实现了文件的创建，删除，打开，读写，关闭，查看，目录的创建，删除等。-Analog linux file system write the procedure is relatively simple. The physical basis of the file system to the track (40) from 0 to 39. Each track is divided into eight sectors, each sector 512B. The file system file create, delete, open, read and write, close view, the creation of the directory, delete.