On 8/3/20 2:21 AM, Jyrki Tikka wrote:
The boot disks must have an EFI boot partition even though it's not used in this case.
IIRC, they need a partition at the beginning of the drive to reserve space for GRUB2. That should be a "BIOS boot partition" not an "EFI System partition" for GRUB2. It's not used for a filesystem, but it is used to store GRUB2's second stage image.