From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Brown Subject: Re: RAID Problem Date: Wed, 17 Mar 2010 11:09:43 +1100 Message-ID: <20100317110943.793c8e7b@notabene.brown> References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: colli419@umn.edu Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 16 Mar 2010 18:32:39 -0500 colli419@umn.edu wrote: > Hello, I am having problems with my RAID as follows: > > I installed the drives in an old computer and created the RAID and it > worked great. When I tried to install the same RAID set in a new computer I > could get it to mount manually with some messing around but couldn't get it > to mount automatically as in the old machine. I was wondering if zeroing > the superblocks and trying to re-create the RAID would be a good idea. The > data that is stored on the drives should otherwise be intact because I had > it running just fine the other day. Any help at all would be most > appreciated. > You haven't provides a lot of concrete information, like error messages during boot or "mdadm -E" output of devices or even kernel/mdadm versions, so I can only guess, but my guess would be that you can fix it by assembling the array with "--update=homehost" i.e. mdadm --assemble /dev/mdwhatever \ --update=homehost /dev/device1 /dev/device2 .... NeilBrown