[syslinux] Getting classic BIOS and UEFI boot on the same disk?

William R. Somsky
Wed, 21 Aug 2019 18:31:19 -0000

I'm not sure if it is useful, but with the advent of UEFI only machines,
we've run into a similar problem w/ out custom CentOS 7 USB installation
keys.

Basically, we create a gpt device w/ a single FAT16 partition (this
would be your /boot partition for a full installation) containing an
EFI/BOOT/ directory with the syslinux-efi files and a SYSLINUX/
directory with the syslinux-bios files.

Would further info on this be helpful?

- WRSomsky


On Wed, Aug 21, 2019 at 12:57:05PM +0200, Erik Rull via Syslinux
wrote:
> Hi all,
>
> We're using the classic boot BIOS syslinux successfully for many years,
but
> meanwhile it's getting harder to buy hardware the still supports this
boot
> mode.
> The option for us would be syslinux EFI boot.
> To avoid too many changes we would like to generate an image for our
different
> hardware parts that supports both - classic BIOS boot and (U)EFI boot.
> This would allow us to leave the BIOS in whatever state it is and the
system
> will simply boot.
>
> [[...]]

--
Dr. William R. Somsky           	                   somsky at uw.edu
Department of Physics, Box 351560		    B217 Phys-Astro Bldg
Univ. of Washington, Seattle WA 98195-1560		    206-616-2954