REDHAT认证学习资料Chapter4.doc

Mounting Floppy Disks and Removable Media To read floppy disks and other removable media with Red Hat Linux, you need to mount the device, just as you would any other file system. Red Hat has created mount points in the /mnt directory for just this purpose. The subdirectory, /mnt/floppy, is for mounting a single floppy disk at a time, while /mnt/cdrom is used to mount a single CD-ROM at a time. To mount an MS-DOS-formatted floppy, you would run: # mount -t msdos /dev/fd0 /mnt/floppy Recall that the -t option to the mount command specifies the type of file system were mounting. The device, /dev/fd0, is the first floppy disk device. If you have a second floppy disk, the second device would be /dev/fd1. To mount both the first and second floppy at the same time would require another directory, such as /mnt/floppy2, as the mount point. The final argument tells mount which mount point to use. After you have mounted the floppy disk, any reads or writes you perform in /mnt/floppy happen on the floppy disk. The device for your CD-ROM is normally /dev/cdrom. To mount an IS09660 CD-ROM, run: # mount -t iso9660 /dev/cdrom /mnt/cdrom Now you can read the contents of /mnt/cdrom as if it were a normal file system on your system. To unmount a floppy or CD-ROM, use the unmount command with the mount point as an argument. The following commands unmount both our floppy and CD-ROM: # umount /mnt/floppy # umount /mnt/cdrom It is important you unmount floppy disks before removing them. Because of the way UNIX caches information before writing to disk, there is a good chance youll lose data by simply removing a floppy without unmounting it. One system has a Zip drive of 100MB. The device is /dev/hdd and it was formatted as a Linux Native (Extended 2 File System) on the one partition /dev/hdd1. The directory /mnt/zip was created and a permanent entry in /etc/fstab was added to mount the device at every reboot. The command to manually mount the Zip drive was: # mount /dev/hdd1 /m