The solution here was to update the pbr file for Windows’ bootloader. On Mon, Jun 19, 2017 at 8:03 AM, Martin Oppegaard < [email protected]> wrote:
> > > On Monday, June 19, 2017, Theo de Raadt <[email protected]> wrote: > >> > I get the error Message that "installboot: /mnt/usr/mdec/biosboot >> extends >> > Beyond sector 268435455. OpenBSD might not boot." I'm dual booting with >> > Windows using Windows' boot loader first. >> >> You've created an OpenBSD MBR partition too far up your disk. It >> won't work in legacy mode. The BIOS won't be able to read it. >> >> You can try EFI mode instead. > > > It used to work fine for many years and upgrades. I don't think it's new > enough to have EFI. > > In the worst case I'll reinstall on the backup HDD. >
