From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jeffrey B. Layton" Subject: mdadm array not found on reboot Date: Mon, 07 May 2007 12:45:10 -0400 Message-ID: <463F5796.1060808@charter.net> Reply-To: laytonjb@charter.net Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hello, I apologize if this is a FAQ question or a typical newbie question, but by google efforts have yielded anything yet. I built a RAID-1 using mdadm (Centos 4.2 with 2.6.16.19 kernel and mdadm 1.6.0-2). It's just two SATA drives that I created using: mdadm --create --verbose /dev/md1 --level=raid1 --raid-devices=2 /dev/sda1 /dev/sdb1 The md built correctly and I built an ext3 on it. I created /etc/mdadm.conf and modified /etc/fstab to mount the device. But when I reboot, the kernel drops into RAID repair mode because it can't seem to find /dev/md1 and yells about not finding any valid superblock (I can get the exact message if needed). However I can mount /dev/sda1 with no problems. The only way I can get md1 back is to issue the command: mdadm -A /dev/md1 /dev/sda1 /dev/sdb1 and everything works. I want to have /dev/md1 mounted automatically on boot. I'm missing something simple here - how do I do this? TIA! Jeff