Jonathan Billings wrote:
I know that in el7, grub2 uses os-prober (http://joeyh.name/code/os-prober/), which is probably what it uses in the LiveCD.
Yes, thanks. I confused os-prober with grub2-probe, which is an executable file. Hopefully I should be able to work out why I am getting this cannot find a GRUB drive for /dev/block/8 error when I run grub2-mkconfig