Hello Micha, If I am not mistaken, you are correct, it can be on raid1, but not raid0 or raid5. I had a similar problem in that my test system wouldn't boot after installing/upgrading to CentOS-4. Just stopped at a grub> prompt. As it turned out, device.map was missing one of my drives (I am running raid5). The minute I added the device to device.map I could then boot normally. Below are my /boot/grum/device.map and /etc/fstab files. I added "(hd2) /dev/hdi" to the device.map. LABEL=/boot equates to /dev/hde1. [root@thorn grub]# cat device.map (fd0) /dev/fd0 (hd0) /dev/hde (hd1) /dev/hdg (hd2) /dev/hdi [root@thorn grub]# cat /etc/fstab # This file is edited by fstab-sync - see 'man fstab-sync' for details /dev/md0 / ext3 defaults 1 1 LABEL=/boot /boot ext3 defaults 1 2 none /dev/pts devpts gid=5,mode=620 0 0 none /proc proc defaults 0 0 none /dev/shm tmpfs defaults 0 0 /dev/hde2 swap swap defaults 0 0 /dev/hdd4 /media/zip auto pamconsole,exec,noauto,managed 0 0 /dev/hdc /media/cdrecorder auto pamconsole,exec,noauto,managed 0 0 /dev/fd0 /media/floppy auto pamconsole,exec,noauto,managed 0 0 Unfortunately I think this is a hardware problem on this machine as I have seen this happen before. Only appears to be a problem during installs, updates (even kernel) don't seem to cause any problems like this. jer Sunday, March 6, 2005, 7:01:53 AM, you wrote: >> >> >> Man I wish grub DID support RAID devices.... *sigh* >> And yes... I do understand 'why'... :-) > Well, I think /boot CAN be on a mirrored (Raid 1) md device, if that's any > help. -- USE THE BEST . . . Linux for servers . . . Macintosh for graphics . . . Palm for mobility . . . Windows for solitaire!