here is an interesting find: replacing the missing disk (mdadm --add /dev/md0 /dev/sdb1) and waiting for sync to complete leads to proper booting system the system continued boot even after I --failed and --removed the second disk.
I could not return the system to it's original boot fail state until I zero'd the super block on the second disk. some additional messages that I had not seen before (after boot is failing again) device-mapper: table: 252:0: linear: dm-linear: Device lookup failed device-mapper: ioctl: error adding target to table device-mapper: table: 252:1: linear: dm-linear: Device lookup failed device-mapper: ioctl: error adding target to table (then repeats the above once more) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1351528 Title: boot fails on raid (md raid1) + LVM (combined / + /boot) + degraded To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1351528/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
