[newbie] unmount & format floppy w/ 7.1

[Victor Richardson]

I've got a stack of former bootdisks and network.img that I would like to format and use again. I've tried using Kfloppy, but it says;

/dev/fd0 is mounted.
Please unmount the floppy first.

#fdformat /dev/fd0 returns;

Double-sided, 80 tracks, 18 sec/trac. Total capacity 1440 kB.
Formatting...
ioctl(FDFMTTRK): Device or resource busy

And when I try;
#dd if=(file path) of=/dev/fd0

0+0 records in
0+0 records out

I assume this is because supermount is activiated, how do I unmount
fd0 so I can 'fdformat' or use Kfloppy to format the disks?
Thanks