After installing Ubuntu Studio 12.04 from DVD onto the fourth hard disk, it fails to boot, even when explicitly choosing the fourth hard disk as the boot device. I have SUSE 11.2 on the first 2 SCSI disks (which form a RAID) and Studio64 on the 1st IDE disk (that is, the third disk). Looking at the /boot directory on the Ubuntu partition, I see there is no initrd image. Editing the GRUB configuration file to include (hd3,1)/vmlinuz and of course (hd3,1)/initrd should fix the problem. But still GRUB gives a file not found error. This appears to me that, no mkintrd during the booting process (checked with LiveCD) runs like in OpenSUSE. How do I create the initrd to make Ubuntu bootable.