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.
