I have this problem as well ( 4 disks + hot spare with one raid10 /lvm) and one raid1 (/) array ).
Workaround: Setting BOOT_DEGRADED=true in /etc/initramfs-tools/conf.d/mdadm works like a charm. You need to do an #sudo update-initramfs -u afterwards. Drawback: booting takes longer than normal, since mdadm waits 30s to assemble the (presumably) broken array and I'm not sure what happens if the arrays are *really* broken -- Raid10 array not assembled at boot, all disks are marked as spare https://bugs.launchpad.net/bugs/316670 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs