I installed ubuntu 12.04 64bit on an empty hard drive. Install went ok, but I cannot get it to go on line. I formatted the disk, by making it an external drive and using another computer to format this drive. I reinstalled the hard drive in the computer and put the disk in the CD drive. I started the computer and got this on a black screen:
error: no such partition grub rescue>
I cannot boot off of the disk, and the hard drive is empty. What should I do?