30.01.2026 18:11, Markus Laire wrote:
No, that wasn't it.
With further testing I've noticed that GRUB can't access anything
beyond the first 128 GiB of the USD SSD during MBR boot, but there is
no such limitation during UEFI boot. For example if I place "BIOS Boot
Partition" beyond 128 GiB, then GRUB just shows text "GRUB" and can't
even get to the command line.
Could this be some strange BIOS limitation?
Could be although I am very surprised to see it in the EFI system
https://tldp.org/HOWTO/Large-Disk-HOWTO-4.html