[CentOS] CentOS 6.2 on partitionable mdadm RAID1 (md_d0) - kernel panic with either disk not present
Arun Khan
knura9 at gmail.comMon Oct 15 10:32:52 UTC 2012
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__ SOLVED __ On Sat, Jun 23, 2012 at 10:14 AM, Arun Khan <knura9 at gmail.com> wrote: > > I have not had a thorough look at the dracut script though. > I also posted this problem on the mdadm mailing list but could not get the problem resolved. So did some searching on the suspect candidate 'dracut' After some more searching I found these two bugs reports: CentOS 6.2 <http://bugs.centos.org/view.php?id=5400> CentOS 6.3 <http://bugs.centos.org/view.php?id=5970> Using "System Rescue CD" and mounting the disk image files, I appended 'rdshell' to the kernel line in grub.conf. With 'rdshell' one can at least do the following to get the system operational. Booted the system with a disk failure At the rdshell prompt: # mdadm --run /dev/md_d0 (replace device name with your device name) # cat /proc/mdstat (make sure your raid device is active with one member failure) # CTRL-D (exit the rdshell) The system will boot with md_d0 in degraded mode. Login in to the system. # yum update dracut (dependency dracut-kernel is pulled in) As of this writing it is dracut-004-284.el6_3.1.noarch # cd /boot # dracut <initramfs file name> <kernel version> Update grub and reboot. System boots with when either disk has failed. -- Arun Khan
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