From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Evans Subject: Re: Adding disks with raid to existing raid system. Date: Mon, 15 Mar 2010 17:36:04 -0800 Message-ID: <4877c76c1003151836r56d03faeh50d8bfd1bb2925cf@mail.gmail.com> References: <40b437201003142323g7b0f4e48wb9d58b963f12e988@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <40b437201003142323g7b0f4e48wb9d58b963f12e988@mail.gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Simon Matthews Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Sun, Mar 14, 2010 at 10:23 PM, Simon Matthews wrote: > I have just built a system and have it booting off a software raid > partition. The raid sets use devices /dev/md0, /dev/hd1, /dev/md2, > /dev/md3. > > I now need to transfer some additional disks to this system. These > disks are presently in another system where they host a number of rai= d > sets, currently also /dev/md0 - /dev/md4. > > I need to ensure that the data on the raid set that I am adding to th= e > system is not lost. However, clearly, I can't have the raid sets on > these disks come up as /dev/md0-md4. How do I ensure this and have > these raid sets come up on /dev/md5 and higher? > > Simon > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid"= in > the body of a message to majordomo@vger.kernel.org > More majordomo info at =A0http://vger.kernel.org/majordomo-info.html > Either use an mdadm.conf to specify the mapping of UUID to md device (which will over-ride any auto-detected requests), or use the home-host fallback. Obviously the administrator specifying how they'd prefer mdadm to assemble the drives is preferable. You will probably want to regenerate your initrd; if you are using auto-assembly on root without an initrd, I highly suggest upgrading to use an initrd/initramfs. You might find this one easy to customize for your needs if your distribution lacks one or you dislike the one it generates: http://sourceforge.net/projects/aeuio/ -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html