From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ken Subject: Re: hardware raid 5 and software raid 0 stripe broke. Date: Fri, 12 May 2006 09:07:44 -0400 Message-ID: <446488A0.8050004@4dcsi.com> References: <4463ECBD.8040506@4dcsi.com> <17507.62169.927233.886775@cse.unsw.edu.au> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <17507.62169.927233.886775@cse.unsw.edu.au> Sender: linux-raid-owner@vger.kernel.org To: Neil Brown Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Neil Brown wrote: > On Thursday May 11, Ken@4dcsi.com wrote: > >> We have a Linux box running redhat 7.2 We have two hardware >> controllers in it with about 500gig's each. They're raid 5. We were >> using a software raid to combine them all together. 1 hard drive went >> down so we replaced it and now the system won't boot. We have used a >> Knoppix boot cd to get into a linux system. We can see /dev/sda1 and >> /dev/sdb1. However, /dev/md0 cannot be accessed. Is there a safe way >> to create the software raid from the cd to see if maybe mdadm on the >> original system got corrupt? any help would be greatly appreciated. >> > > What booted off knoppix, what does > > mdadm -E /dev/sda1 > mdadm -E /dev/sdb1 > > produce? > > How about > mdadm -A /dev/md0 /dev/sda1 /dev/sdb1 > > NeilBrown > > Thank you for your response Neil. We got it up and running again. I don't remember what we did though. We've been going on no sleep all week trying to setup a new server and right before the old one crashed we were all ready to go home and take a little rest. Thanks again. --Ken