From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wols Lists Subject: Re: raid 1 assembled but inactive - works from a "live" distribution... Date: Thu, 20 Jul 2017 14:42:55 +0100 Message-ID: <5970B35F.1030007@youngman.org.uk> References: <8504efd5-dc98-afe6-6d6c-5b1352a9c134@yahoo.gr> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <8504efd5-dc98-afe6-6d6c-5b1352a9c134@yahoo.gr> Sender: linux-raid-owner@vger.kernel.org To: petasisg@yahoo.gr, linux-raid@vger.kernel.org List-Id: linux-raid.ids On 20/07/17 12:52, Georgios Petasis wrote: > Another puzzling fact, is that booting fedora 25 with the previous > kernel works. > With the latest kernel does not. > I tried because I saw "md: personality for level 1 is not loaded!" in > the logs... Has the initrd or similar been changed somehow? I'll let the experts chime in more, but this sounds like the kernel module for raid1 has become inaccessible. You've got superblock v1.2, which means the old trick of booting off of one disk read-only, before assembling the raid and switching root read/write won't work. Therefore you (a) *MUST* have raid1 support in grub, in order to be able to read the mirror to find the kernel, and (b) must have raid1 support in the kernel, so the kernel can see /. As I say, that message makes me suspect that either the grub or the kernel raid-1 support module has disappeared ... Cheers, Wol