Red Hat Linux 9 Professional Secrets [Electronic resources] نسخه متنی

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Red Hat Linux 9 Professional Secrets [Electronic resources] - نسخه متنی

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Floppy Disks in Linux


Chapter 12 describes several ways to access MS-DOS floppy disks under Linux; you can mount the floppy and use Linux commands, or use the mtools utility programs to read from or write to the floppy. You also can create a Linux file system on a floppy disk. In fact, you'll find Linux file systems on the boot and root floppies that you use to install Linux.

Formatting and creating a Linux file system on a floppy is a straightforward process. To format a 3.5-inch high-density floppy in the A drive, for example, use the following command (for more on floppy drive naming conventions, see the 'How to Format a DOS Floppy' section in Chapter 12):

fdformat /dev/fd0H1440

If you have an old PC with a 5.25-inch high-density floppy as the A drive, you can access that floppy with the device name

/dev/fd0h1200 . On the B drive, change the first 0 in the device name to 1.






Insider Insight

After you format the floppy, use the following command to create a Linux file system on the floppy:

mke2fs -m 0 /dev/fd0H1440 1440

The

-m option is used to specify what percentage of blocks should be reserved for the use of super user (

root ). By specifying the

-m 0 option, you ensure that

mke2fs does not reserve space on the floppy disk for the super user. If you do not explicitly specify the

-m option, mke2fs reserves five percent of the disk space for the super user.


After you create the file system on the floppy drive, you can mount the floppy at a mount point (an empty directory) in the Linux file system. The following example shows how you mount the floppy drive at the

/mnt/floppy directory:

mount /dev/fd0H1440 /mnt/floppy

Now you can use Linux commands, such as

cp and

mv , to copy or move files to the floppy disk. Before you eject the floppy disk from the drive, use the following command to dismount the floppy:

umount /dev/fd0H1440


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