Hi, This is just an amusing quirk in installing OpenBSD on softraid on GPT:
The way to set up a softraid on the installer, is to go to the (S)hell boot option, create GPT partition tables yourself on the involved physical block devices e.g. by "fdisk -igy -b 960 sd0" to make sd0 a GPT disk that's actually EFI-bootable by also creating an EFI boot partition on it, then you set up your softraid using "bioctl" which will create out of your sd0 and possibly more devices, a new softraid sd device, let's call it sd1 . You then proceed with the /install.sh script, tell the installer you want to install OpenBSD on sd1 , and you go on telling it that you want sd1 to have a GPT partition table. The installer will pass on the "-b 960" arguments to its "fdisk -ig" on sd1, giving us a ~512KB EFI partition inside the softraid, which will never be needed. You see this by doing "disklabel sd0 && disklabel sd1" in the installed system, which shows both the actually-used EFI boot partition on sd0, and the unused EFI boot partition inside the softraid. This is superfluous, could be removed and save users of 512KB of disk space. Tinker
