I have been testing openvz on centos6 today, and following my normal config I installed software raid1. Everything went fine until a reboot into the centos kernel. On a reboot, I got an error
dracut cannot find root, “sleeping forever”
As an old school sysadmin I hate change, what is dracut I’m thinking (not to mention fstab has UUID’s instead of LABELs, looking like ubuntu now). This replaces the old initrd system. Ok it has a shell you can boot into rdshell which seems kind of cool. On to the fix I found.
I noticed that on openvz dracut never assembled raid1. I ran
dracut -f –add-drivers raid1 –mdadmconf /boot/initramfs-2.6.32-042stab024.1.img 2.6.32-042stab024.1
Which at the time was the stable kernel and rebooted. System is back up with out errors.
You may need to run
mdadm –examine –scan
and update your /etc/mdadm.conf file