My system has only bios - not uefi - and 5 big hdd. All of there has gpt partition table. On 2 of them I has installed opensuse (leap and tumbleweed). On these systems you can definition where grub be installed (write in file /etc/default/grub_installdevice). In my constellation is it /dev/sda and /dev/sdc. The system wich I want to boot, I select with F8-Key - select the boot-medium by bios-function.
Now I installed Fedora 32 at some partitions of /dev/sdd.
For this use I defined a bios_boot partition at /dev/sda1 and then the other ones (boot, root, usr, home). The normal installation process need more then 10 minutes to end the step “installation of grub2” - with the result, that the new system can’t boot.
Then I boot a live system, remounted the system in a “chroot”. So I could install grub2 manually with the command:
grub2-install --force /dev/sdd
How I can tell this to the fedora-system (scribe to what config-file), so that the next updates with the post-install-scripts can find the correct grub2-place and -install-command?