添加盤： Disk /dev/sdb: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 [root@single1 test]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 38G 14G 22G 40% / tmpfs 495M 202M 293M 41% /dev/shm /dev/sda1 388M 384M 0 100% /boot [root@single1 test]# pwd /test [root@single1 test]# ls video.avi 掛載: [root@single1 ~]# mount /dev/sdb /test [root@single1 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 38G 14G 22G 40% / tmpfs 495M 202M 293M 41% /dev/shm /dev/sda1 388M 384M 0 100% /boot /dev/sdb 1008M 34M 924M 4% /test [root@single1 ~]# cd /test [root@single1 test]# ll total 16 drwx------ 2 root root 16384 Jan 18 18:23 lost+found 我的video.avi 不見了!! [root@single1 ~]# umount /test [root@single1 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 38G 14G 22G 40% / tmpfs 495M 202M 293M 41% /dev/shm /dev/sda1 388M 384M 0 100% /boot [root@single1 ~]# cd /test [root@single1 test]# ll total 4 -rw-r--r-- 1 root root 16 Jan 18 18:20 video.avi OK，它又回來了！ 所以，mount磁盤之前，最好檢查下路徑下的文件。有用的mv，沒用的rm。