Public bug reported: mdadm does not attempt to start partial md devices (incremental assembly) during initramfs and can cause system to fail to initramfs prompt if rootfs on md.
http://askubuntu.com/questions/789953/how-to-enable-degraded-raid1-boot-in-16-04lts Fixed in debian mdadm 3.4-2: https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=784070 ** Affects: mdadm (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1635049 Title: Boot fails with degraded mdadm raid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1635049/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs