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Old 02-19-2005, 08:22 AM   #1
Registered: Nov 2003
Location: Belgium
Posts: 81

Rep: Reputation: 15
boot from software RAID 1


I have 2 identical IDE disks which I'm trying to use as a RAID 1 system. On a third disk I compiled a custom 2.6.10 kernel supporting all necessary RAID stuff which runs perfectly (Slackware 10.0). I have 2 raid devices /dev/md0 and /dev/md1. Both come up perfectly at boot (autodetection).

I copied the entire / to /dev/md0 (using cp -xa / /newroot) and use LILO to write the MBR of both disks in the array. When I boot from the raid disks all goes well (raid is autodetected, kernel is loaded, ....) but booting hangs at:

warning: unable to open an initial console

What could be the problem here? I am using udev so maybe that has something to do with, I don't know.

can anybody help me?
Old 02-19-2005, 10:12 AM   #2
Registered: Aug 2004
Distribution: LFS
Posts: 350

Rep: Reputation: 31
It sounds like /dev on your raid array is empty. Boot off your third disk, mount your raid array at /newroot and execute the following

mknod -m 600 /newroot/dev/console c 5 1
mknod -m 666 /newroot/dev/null c 1 3
This should create the minimum /dev entries needed at boot before udev runs.


Last edited by madluther; 02-19-2005 at 11:05 AM.
Old 02-20-2005, 03:41 AM   #3
Registered: Nov 2003
Location: Belgium
Posts: 81

Original Poster
Rep: Reputation: 15
indeed the /dev directory was empty. I just copied the /dev directory from the third disk and now all works.

thank you for your help


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