From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe - Profihost AG Subject: Re: grub2/grub-pc install not possible on mdadm Date: Fri, 02 Mar 2012 09:44:20 +0100 Message-ID: <4F508864.4050600@profihost.ag> References: <4F4C9A11.9060302@profihost.ag> <4F4F4B1D.4050000@redhat.com> <4F4F4EB3.6030909@profihost.ag> <4F4F519E.7040206@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4F4F519E.7040206@redhat.com> Sender: linux-raid-owner@vger.kernel.org To: Jes Sorensen Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids > Looking at your original mail again - you are running a raid with > metadata 1.2, which means your BIOS will not know how to read the disks > as a raid device. > You should be able to install grub into the MBR of /dev/sda or /dev/sdb. > I believe that is possible with 1.2 metadata. 1.1 was totally broken for > this if I remember correctly. Correct that's why i've also tried to install it on sda / sdb but then grub complains about not finding any partition table. > That said, if your system is EFI based, I suspect you will need to have > the bios_grub partition on the physical drives so the BIOS can read it. > It's not going to do much good having it on the raid partition if the > BIOS isn't able to read those. The bios is not the problem - grub simply does not want to install it boot sector to sda / sdb. It does it fine when using metadata 0.9. Stefan