I have carefully followed the RAID instructions at: https://wiki.archlinux.org/index.php/Software_RAID_and_LVM#RAID_installation I have not used LVM, just RAID. I have double-checked what I actually did, and believe that I did exactly what the page tells me to do. I have two identical drives, which I configured as RAID1. At the conclusion of the installation, the instructions say: ---- Once it is complete you can safely reboot your machine: # reboot ---- When I try to reboot, I receive the error message: ERROR: device /dev/md0 not found ERROR: unable to find root device /dev/md0 What do I have to do to get past this error? Doc PS I tried to go back to the very beginning and walk through the instructions again, but when I do that, when I reach this step: mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sd[cd]3 I am now informed that /dev/sdc3 is busy or unavailable. -- Web: http://www.sff.net/people/N7DR