Paul Gideon Dann said the following at 06/21/2012 03:41 AM : > On Wednesday 20 Jun 2012 11:27:54 D. R. Evans wrote: >> When I try to reboot, I receive the error message: >> ERROR: device /dev/md0 not found >> ERROR: unable to find root device /dev/md0 > > To me, this sounds like the RAID array is being given the wrong name, or the > mdadm hook isn't being added to /etc/mkinitcpio.conf. > Extract from /etc/mkinitcpio.conf (sorry about any possible wrapping issue): MODULES="dm_mod" ... HOOKS="base udev mdadm_udev lvm2 autodetect pata scsi sata filesystems usbinput fsck" > When you get the above error message, are you dropped to a busybox shell? If > so, can you do: > > # ls /dev/md* > > ...to see if the array is being started at all? > I am dropped to some sort of primitive shell (the prompt says "rootfs"). As you suspect, ls /dev/md* reports no such file or device. So I think we have a clue and it looks like you are right that the RAID is not being started, although I don't know why. A couple more facts that may provide useful information: 1. I also did an ls /etc And I see that there are only three entries: fstab, mtab and udev. I don't know if that's reasonable. I naïvely expected to see a populated /etc (since presumably /etc/mkinicpio.conf has been read at this point), but perhaps that expectation was incorrect. 2. I checked that the RAID will start correctly if I assemble the array from within a different OS, and it does so. Doc -- Web: http://www.sff.net/people/N7DR
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