From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jeffrey B. Layton" Subject: Re: mdadm array not found on reboot Date: Mon, 07 May 2007 13:15:34 -0400 Message-ID: <463F5EB6.2090605@charter.net> References: <463F5796.1060808@charter.net> <463F5CA6.6090407@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: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Justin Piszcz Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Justin Piszcz wrote: > > > On Mon, 7 May 2007, Jeffrey B. Layton wrote: > >> Justin Piszcz wrote: >>> >>> >>> On Mon, 7 May 2007, Jeffrey B. Layton wrote: >>> >>>> 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? >>> >>> Sounds like a udev issue and/or you did not create the mdadm.conf >>> properly. Show us your mdadm.conf. >> ARRAY /dev/md1 level=raid1 num-devices=2 >> UUID=e235ee6c:415f1494:23c28b59:afd20140 >> devices=/dev/sda1,/dev/sdb1 >> ARRAY /dev/md0 level=raid1 num-devices=2 >> UUID=7121b438:7d36f9f6:8aa9c8b3:b5b0d211 >> devices=/dev/hdc1,/dev/hdd1 > > What distro? CentOS 4.2. I've been reading something about raidautorun. Would help in this case? Thanks! Jeff