How can I use a disk with GPT partition table on a system with a BIOS but no (U)EFI?
I have a system with a 3 TB drive (no other drives and since this is a remote machine I have no choices here) and with a GPT for obvious reasons. Ubuntu 12.04 is being bootstrapped onto the system and this worked so far. Now after bind-mounting
/sys from the host into the target system and
chrooting into it, I installed
linux-image-server which worked fine (after linking
/bin/true). Because this is a remote machine I have to do all of this via SSH and have no bootable CD or anything. I can boot into a rescue system if it fails, though (PXE).
Now I know that
grub2 is supposed to support the scenario, but for the life of me I cannot figure out how to install it.
The boot (and root) device is to be
/dev/md0, composed of
/dev/sdb1 in RAID mode 0. With
/dev/md0 mounted under
/target I am running:
grub-install --root-directory=/target --no-floppy /dev/sda
which fails with:
/usr/sbin/grub-setup: warn: This GPT partition label has no BIOS Boot Partition; embedding won't be possible!. /usr/sbin/grub-setup: error: embedding is not possible, but this is required when the root device is on a RAID array or LVM volume.
So how can I get
grub2 installed in order to have this BIOS-based system boot properly?
Note: it doesn't matter whether I run this inside or outside the
chroot environment. The error and output are identical. Likely because I bind-mounted
/dev etc into place. Of course appropriate adjustments to the command line (no
--root-directory=) have been made.