umount: /mnt/floppy: device is busy

[Michael Hipp]

How do I get it to unbusy my floppy? I know good and bloody well nothing 
is using the floppy, but it won't unmount. I killed every process within 
a mile of it. I tried 'umount -f' and '-r' to no avail.

# umount /mnt/floppy
umount: /mnt/floppy: device is busy
# umount /dev/fd0
umount: /mnt/floppy: device is busy

Is there some way to force an unmount or must I pretend this is Windows 
and reboot?

Michael