Public bug reported: When a RAID1 system is degraded (e.g. unplug /dev/sdb, leaving obnly /dev/sda), grub-pc properly enters prompt but system is reset as soon as one attemps to boot OR one enters the command-line and issue the 'ls' command.
This bug is known (and presumably fixed) to Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=626853 Shortly put: adding the 'GRUB_TERMINAL=console' to '/etc/default/grub' (and executing 'update-grub' afterwards) allows to circumvent the issue (verified on Ubuntu/Quantal 12.10). I believe this bug is critical because it shows up only when a disk fails but remains latent on a healthy system. Cheers ** Affects: grub2 (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/1073108 Title: grub-pc fails to boot (system resets after GRUB prompt) on degraded RAID To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1073108/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs