On 2020-06-25 20:16, Theo de Raadt wrote: > I'd say that I simply don't see why the installer destructively > re-arranges the disk's scheme prior to officially choosing to write > the new partitioning scheme to the disk.
I'm not sure that I believe that and it shows you what YOU are about to commit! AFAIK grub is called grub for a reason. In that it needed more disk space than the MBR offered. IOW grub is far more destructive than OpenBSD or the Windows installer. The fact that Linux distros detect and fix that destruction doesn't change that. In my experience (less GPT), it is far easier to install Windows after OpenBSD and get both working again than installing Windows after installing Grub/Linux.
