Create a virtual floppy disk image in Linux

3.5 inch 1.44m floppy disk structure:

• 2-sided, 80-sided, 18-sector, 512-byte/sector
• Total number of sectors = 2x80/x 18 sectors/sectors = 2880 sectors
• Storage Capacity = 512 bytes/sector X 2880 sectors = 1440 kb = 1474560b

1. Create a virtual floppy disk image file
Any of the following three commands can create a virtual floppy disk image file with the same results:

• Dd If =/dev/Zero of = floppy. img bs = 1474560 COUNT = 1

• Dd If =/dev/Zero of = floppy. img bs = 512 COUNT = 2880

• Dd If =/dev/Zero of = floppy. img bs = 1024 COUNT = 1440

2. Create a file system on the disk image file
Any of the following two commands can create a file system on a floppy disk image. You can select a file system as needed:

• Mkfs. vfat floppy. img/* Create and format the file system as vfat */

• Mkfs. ext2 floppy. img/* Create and format the file system as ext2 */

When an ext2 file system is created, the following message is returned: floppy. IMG is not a block special device. Proceed anyway? (Y, n) y, select y, and press Enter.

3. Read and Write the created floppy disk image
First, mount the floppy disk image to a folder and run the following command to create a folder floppy:

• Mkdir floppy

Run the following command to mount a floppy image:

• Mount floppy. IMG floppy-o loop/* is-o loop, not-0 loop, and it must be loop */

If the system used does not automatically recognize the file system, add the-T option to the mount command:

• Mount floppy. IMG floppy-o loop-T vfat/* If the floppy image is a vfat File System */

• Mount floppy. IMG floppy-o loop-T ext2/* If the floppy image is an ext2 File System */

Then, you can perform operations on the floppy folder like a normal folder, such as copying the "kernel" file to it:

• CP kernel floppy

View the files:

• Ls floppy/* output "kernel "*/

After the operation, run the following command to uninstall it:

• Umount floppy. img

In this way, the previous operation is completely written into the virtual floppy disk image file.

If

Mount: Unknown filesystem type 'vfat'

You need to view and recreate

/Lib/modules/2.6.xxx/modules. Dep

Use depmod to regenerate modules. Dep and restart