> The MBR goes where the MBR goes, the PBR goes where the PBR goes, and /boot goes where /boot goes. They all go on the root disk, the disk that holds your root file system, in your case, sd1. See FAQ 14. > > If you want your machine to boot off an "alternate" drive, you need to do some magic before the OpenBSD boot code (of all flavors) is invoked to get it to load the MBR of the desired device. > > Please read the FAQ section on multibooting (FAQ 4) over and over until you realize this isn't trivial stuff.
Or just install openbsd on the partition u like and afterwards chainload that partition in grub2.

