If you still have the vm setup, you could just try to boot the text installer media again, enter the rescue mode and see how it wants to mount the existing raid disks (not degraded, both present) in the vm. That's where it used to always happen. Oherwise, only occasionally during normal reboots.
> When trying to boot with one disk missing, the system would not boot Right, after way too many release cycles with the unmaintained mdadm modifications in ubuntu, I moved upstream. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/531240 Title: silently breaking raid: root raid_members opened as luks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-release-notes/+bug/531240/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
