Tortoise-
Now we know that you have the mount points:
hda1 hda2 hda3 hda6 sda

Your fstab needs to use these mount points. If you need different mount points then make them like so:

cd /mnt
mkdir cdrom

I just used cdrom as an example but surely you'll want a mount point named cdrom right? You can make any mount point you want.

After creating /mnt/cdrom do this:

ls

You should now have these mount points:
hda1 hda2 hda3 hda6 sda cdrom

Post your fstab if you need more help.