Hi, Thanks everybody for your help. I have now fixed this on my machine using code similar to that suggested by Peter Haight.
Edit "/usr/share/initramfs-tools/scripts/local" and find the following comment "# We've given up, but we'll let the user fix matters if they can". Just before this comment add the following code: # The following code was added to allow degraded RAID arrays to start if [ ! -e "${ROOT}" ] || ! /lib/udev/vol_id "${ROOT}" >/dev/null 2>&1; then # Try mdadm and allow degraded arrays to start in case a drive has failed log_begin_msg "Attempting to start RAID arrays and allow degraded arrays" /sbin/mdadm --assemble --scan log_end_msg fi Peter's suggestion of just using [ ! -e "${ROOT}" ] as the condition test didn't work, so I used the condition test from the "if" block above this code and it worked fine. To rebuilt the boot image use "sudo update-initramfs -u" as suggested by Plnt. This script calls the "mkinitramfs" script mentioned by Peter and is easier to use as you don't have to supply the image name and other options. I have tested this a couple of times, with and without my other drives plugged in without any problems. Just make sure you have a cron item setup to run "mdadm --monitor --oneshot" to ensure the System Administrator gets an email when an array is running degraded. This has worked on my machine and I think this is a sound solution. Please let me know if it solves your problems also. This bug has the title "Bug #120375 is not in Ubuntu", does this mean that it is not considered to be an Ubuntu bug? I believe it is due to the fact that involves the way the startup scripts are configured (it is definitely not a bug in mdadm). How do we get this escalated to an Ubuntu bug so that it will be solved in future releases? Good luck, Ken -- cannot boot raid1 with only one disk https://bugs.launchpad.net/bugs/120375 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs