Le 20/09/2021 à 13:26, Stéphane Delaunay a écrit :
on Wednesday, September 15th, 2021 at 12:13 PM, Pascal Hambourg
<[email protected]> wrote:
When you are in the system, you just need to install the package
grub2-common and run update-grub to generate a proper grub.cfg.
Yes, this was the solution. I think it was a misunderstanding on my part and I
got confused about the partitions and installation.
Installing grub without specifying a device parameter added the config to the
/boot-RAID and made GRUB on flash open it.
What do you mean by "installing grub without specifying a device
parameter" ? update-grub does not install GRUB, it only writes grub.cfg.
I'm not sure whether I should also install grub to sda/sdb as well, because
I've read that this can cause issues with grub-update for some reason.
Do you mean "update-grub" ? It writes grub.cfg regardless of whether and
how an actual GRUB boot loader is installed.
It's probably not necessary for this system, but might be needed if I need to
install the drive in another one.
Indeed installing a GRUB boot loader on the drives is useless if you run
GRUB as a Coreboot payload. You may install it on both drives if you
want to boot from a conventional BIOS firmware. Install package grub-pc
and select both drives when prompted.
Note that this setup won't boot from a UEFI only firmware without legacy
BIOS compatibility. Achieving redundant UEFI boot is more complicated :
you need to create non-RAID EFI system partitions on both drives and
mount them, install package grub-efi-amd64-bin [*] and manually install
GRUB in both EFI partitions with appropriate commands :
grub-install --target=x86_64-efi --no-nvram --force-extra-removable \
--efi-directory=/boot/efi1
grub-install --target=x86_64-efi --no-nvram --force-extra-removable \
--efi-directory=/boot/efi2
[*] Unlike grub-pc, the package grub-efi-amd64 configuration does not
support multiple locations.
