I have a Linux setup that I boot in UEFI mode with GRUB. I want to try out OpenBSD, which unfortunately doesn't support GPT or UEFI yet, so I partitioned a drive with a traditional MBR table and installed OpenBSD to that disk using their install CD.
I then attempt to chainload the OpenBSD bootloader in typical GRUB fashion:
menuentry "OpenBSD" {
insmod part_msdos
insmod chain
set root=(hd1,4)
chainloader +1
}
but I am met with "Invalid EFI File Path".
Is it possible to chainload a BIOS bootloader once you have first booted in EFI mode? I can fall back to selecting the drive to boot from in my motherboard's boot menu, but a GRUB menu entry would obviously be preferable.