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

William R. Somsky somsky at uw.edu
Wed Aug 21 11:31:19 PDT 2019


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


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