I recently somewhat followed the grub2 installation section and forgot to generate the cfg file and ended up at a prompt and I did not backup my syslinux installation. This is how I solved it and I was wondering if it would be okay to add it to the page. Of course I will do it more proper than on this forum.
From an Arch Live Cd Do Prepare Hard Drives, Manually Configure Mount Points, Make Sure These Are the Same as your original Arch Installation
Switch to Another Window and Chroot into Your Installed Arch
mount -o bind /dev /mnt/dev
mount -t proc /proc /mnt/proc/
mount -t sysfs /sys /mnt/sys/
chroot /mnt bash
Then generate the config file.
GRUB_PREFIX="/boot/grub" grub-mkconfig -o /boot/grub/grub.cfg
I would have thought you could put that in the recovery section.
It may be an idea to put this suggestion in the discussion page for the wiki page: https://wiki.archlinux.org/index.php/Talk:GRUB2
NERD in Training :: Please be Gentle