I reported this problem some time ago but I still cannot boot my FC6 disk. I have been poking around the GRUB source and I now have a better understanding of what GRUB does but I don't understand this problem. I have 2 disks, one is a SATA disk that has Windows XP on it. The other disk is an IDE that has my FC6 on it. When I try to boot to the FC6 disk, the machine just reboots over and over again. I then boot from the rescue disk and look at the partitions using fdisk. Everything looks normal. The Windows stuff is on /dev/sda and the FC6 stuff is on /dev/hdk. /boot/grub/device.map contains: (hd0) /dev/sda (hd1) /dev/hdk If I enter GRUB in interactive mode and do # geometry (hd0,0) I get the output I expect but when I do # geometry (hd1,0) GRUB tells me that there is no such disk. The reason GRUB won't boot is that is fails the root (hd1,0) command in the grub.conf file. I even re-installed GRUB # grub-install /dev/hdk with no problems but when I go back inro GRUB it still tells me there is no hd1. Can anyone give me somewhere else to look for clues? If GRUB looks at device.map to figure that hd1 means /dev/hdk and grub-install is OK installing on /dev/hdk, why doesn't GRUB recognize the 2nd disk? Steve