On 6/20/2011 4:49 PM, Tom H wrote: > He's using > d-i grub-installer/only_debian boolean false > d-i grub-installer/with_other_os boolean false > so he must have at least another OS Should it not be "grub-install --root-directory=/boot /dev/sda1" then? You need to tell it where the dir is if it's another partition.