在硬盘上要同时安装许多公软件和用户文件，通常用户文件大多是个人的私有信息，不愿让他人随意查看 和复制。报刊上介绍了多种硬盘的加密方法，多数是独占整个硬盘，禁止让不知道口令的用户使用。本人通过 对硬盘逻辑盘结构的详细分析，提出了对硬盘的一个逻辑盘进行加密的有效方法，达到了独占一个硬盘逻辑盘 的目的，从而圆满地解决了上述问题。-the hard drive to install many public software and user documentation, user docum

查看U盘扇区内容的C代码，插上U盘后，在CMD下运行，输入目的扇区数可看到扇区内容-View the contents of U disk sector C-code, plug in the U after-hours, in the CMD to run, enter the number of sectors can see the purpose of the content sector

这是一个C语言编写的FAT16,32通用的文件系统源代码，写得很工整，值得参考。-This is a C language written in FAT16, 32 general-purpose file system source code, written very neat, good reference.

For security purpose and to detect stationary object in a place such as handbag, suitcase a system is implemented to find the static object if it exists in that place for more than 10 min.