实现电脑上各个盘的类型，比如一般A盘为软盘，而U盘为移动盘，很有帮助的，可以用在硬盘类型的识别上。-Each plate to achieve the type of computer, such as floppy disks general A, and U disk to removable disks, helpful, and can be used in the type of identification on the hard disk.