One more thing missing in GAiA is DVD/CD mount point. If you try to do mount /mnt/cdrom on GAiA, you get an error, because of the two reasons:
1. There is not mount point
2. fstab does not have corresponding info.
Let's make it work again.
1. Open fstab to edit with "vi /etc/fstab" and add there the following:
/dev/cdrom /mnt/cdrom udf,iso9660 noauto,owner,kudzu,ro 0 0
2. create /mnt/cdrom folder for using as a mount point: mkdir /mnt/cdrop
Now you are ready to mount your DVD or CD to the machine.