From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert L Mathews Subject: Re: Boot fails from one of the drives cos it's not an ext4 filesystem. Date: Thu, 30 Jan 2014 16:22:33 -0800 Message-ID: <52EAECC9.3070607@tigertech.com> References: <52EABF3D.5060100@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <52EABF3D.5060100@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 1/30/14, 1:08 PM, Richard Gomes wrote: > This is the culprit: /dev/sdb1 is not known as ext4, as it should be. I don't know how to affect that, but are you sure that's actually the problem? In my experience, a boot problem involving mirrored RAID 1 is more likely to be a GRUB issue, needing to be fixed with something like: # grub-install /dev/sdb (This assumes that /dev/sdb1 really is a valid mirror of /dev/sda1; I'm taking that on faith because you didn't include the output of "mdadm --detail" and "mdadm --examine".) -- Robert L Mathews, Tiger Technologies, http://www.tigertech.net/