As root you can mount the floppy without the help of /etc/fstab:
$root> mount /dev/fd0 /mnt/floppy
If you want to be able to mount the floppy as a normal user, you must have a line for the floppy in /etc/fstab :
/dev/fd0 /mnt/floppy auto noauto,user 0 0
For low-level access of the floppy, you must be a member of the group floppy.