Here the steps to rescue the system: Boot with the live CD.
Mount the hard-disc: mount /dev/sda1 /mnt Mount system folders into sda1: mount –t proc none /mnt/proc mount –o bind /dev /mnt/dev mount –o bind /sys /mnt/sys Change the apparent disk root directory: chroot /mnt Now delete all occurences of mdadm: find / -name mdadm | xargs rm -r Now call: update-initramfs -u With this a new ramfs is created without mdadm - the system boots again. -- mdadm update is scaring me: "YOUR SYSTEM IS NOW UNBOOTABLE!" https://bugs.launchpad.net/bugs/652327 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