Check:
[root@localhost root]# mount -t vfat /dev/hda5 /mnt/hda5
mount: wrong fs type, bad option, bad superblock on /dev/hda5,
or too many mounted file systems
[root@localhost root]# mount -t ext3 /dev/hda5 /mnt/hda5
mount: wrong fs type, bad option, bad superblock on /dev/hda5,
or too many mounted file systems
[root@localhost root]# mount -t ext2 /dev/hda5 /mnt/hda5
mount: wrong fs type, bad option, bad superblock on /dev/hda5,
or too many mounted file systems
[root@localhost root]#