On Tuesday, December 06, 2011 03:39:06 PM m.roth at 5-cent.us wrote: > Ack! So I actually need to run grub-install, and do it for both; didn't > know that (always had /boot as a plain vanilla primary partition)?! If /dev/sdb doesn't have the stage1.5 in the first 60 or so sectors after the MBR (which it may not) then yes you'll need to re-run grub-install, or you can do a manual setup inside the grub shell. I've seen a HOWTO out there, but its name (or other greppable info) escapes me at the moment. The stage1.5 portion of grub is not located in /boot, nor is it located in any partition; it's between the MBR and the start of the first partition. Copying the MBR is not enough if you have a stage1.5. This is assuming that your boot is actually using a stage1.5 at all, and it might not be.