I am planning a test install using the new arch-install-scripts via the latest netinstall images from releng (from today's date). I know that for a system where I blow away all previous disc partitions and partition from scratch I can create a 2MiB partition (using MBR and NOT GPT partitioning) before the first formatted partition on the HD and install grub2 during the base install. However can someone please tell me explicitly if, for a system with only BIOS (no UEFI at all), and no GPT partitioning but just plain old MBR partitioning - is the recommended 2MiB post-MBR gap still a "requirement" for that specific situation for grub2 to work? I can't find that as an explicit statement in any of the documentation that I have read for installs/grub2/partitioning! i.e. does grub2 still need to embed the core.img file in the post-MBR gap as the preferred and dev recommended approach in this case? The reason I would like to have that explicit answer is that if I want to install arch on a machine which has a pre-existing NTFS partition, and possibly host-protected partition as well for Windows recovery, at the start of the drive, then if the 2MiB post-MBR gap is a requirement (rather than a nicety) for grub2 with BIOS and MBR partitioning (but no GPT partitioning or UEFI) then unless the drive is re-partitioned and the NTFS partition reduced in size and moved out by 2MiB then there could be problems? However doing that partition jinking about might itself lead to a few issues! I am going to do an install with new partitioning on an old laptop to check that I can successfully use the new install system (without AIF) and hopefully that will work, but I also have other machines with existing and important (to me) Windows partitions that I would really like to NOT corrupt when installing arch to the partitions on their drives. The other reason I am asking this question is that I also have existing dual boot laptops with Windows XP and arch with BIOS and MBR partitioning - and at some point it would presumably be sensible to move from the existing grub to grub2 - and on these systems where I have already checked that there is only a 64 sector post-MBR gap - will this lead to problems if I change from grub to grub2 if I don't change the partitions to have a 2MiB post-MBR gap? Thanks for any help on this - I have been doing reading and trying to prepare without looking an idiot and being a good arch admin, but there is quite a lot to read and I still can't find the answer to the explicit question above! -- mike c
