I meant to add that the problem of old kernels filling the /boot partition is a known issue: http://ubuntuforums.org/showthread.php?t=2238152 With Ubuntu 13.10 and later, we can use this command... sudo apt-get autoremove ...which (the page says) "will now removes those older kernels (images and header and related files too), leaving the current kernel and also 1 latter kernel." Seems reasonable. Mike On Wed, 2 Sep 2015, Mike Miller wrote: > Does this sound like a reasonable plan? After backing up all files and > booting to a Live CD: > > (1) mount /dev/sda and /dev/sdb > (2) Remove /boot directory from / partition on both sda and sdb > (3) Install grub in /boot parttions on both drives. > (4) mount /boot partitons of both sda and sdb > (5) copy known-working kernel and two newest installed kernels to /boot > partition from backup media (formerly in /boot of / partition) > (6) make sure /boot partition is mounted in fstab > (7) /boot partition should also be in the RAID1 > > Does that sound like it would fix it? Any ideas? > > More info below, if you're interested. ;-)