Had the same / similar problem with dapper. 1 scsi disk and 3 ide disks on my system. Grub, when used from the ubuntu live-cd or installed ubuntu says scsi disk is hd3, but when i boot grub says scsi disk is hd0.
Strangely, i think the problem did not appear first time i installed, only after i installed a third OS on my previously empty /dev/hda (primary master IDE drive). My fix was changing the /boot/grub/menu.lst replacing hd3 with hd0. Wich was really way over my head until i spent a day researching the subject. -- Wrong disc number when installing on a system with IDE & SCSI disks https://launchpad.net/bugs/13430 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
