From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1RkP84-0004Bn-3l for garchives@archives.gentoo.org; Mon, 09 Jan 2012 23:59:52 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 1BAB421C080; Mon, 9 Jan 2012 23:59:40 +0000 (UTC) Received: from oproxy1-pub.bluehost.com (oproxy1-pub.bluehost.com [66.147.249.253]) by pigeon.gentoo.org (Postfix) with SMTP id B374A21C029 for ; Mon, 9 Jan 2012 23:58:37 +0000 (UTC) Received: (qmail 30706 invoked by uid 0); 9 Jan 2012 23:58:35 -0000 Received: from unknown (HELO box347.bluehost.com) (69.89.31.147) by oproxy1.bluehost.com with SMTP; 9 Jan 2012 23:58:35 -0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lotussevencars.com; s=default; h=Mime-Version:Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Date:To:Reply-To:From:Subject:Message-ID; bh=aMen9NuZUioygFsmExrI+5TNQvjesCdDCz8gbB1Md/4=; b=MIKAAeTCBkr/aK+O1jxkcSU4DXhkmC4jZP0SNff1yimA7T1mKALijKxNz6Hnc6/3KA3oRi8EKnwMLjWSfQN3qaHyAWq1kKacxiODEyb9zYLP2rtIWEa82gLtx2gTVgpW; Received: from adsl-68-221-20-57.rmo.bellsouth.net ([68.221.20.57] helo=[192.168.1.65]) by box347.bluehost.com with esmtpsa (SSLv3:AES256-SHA:256) (Exim 4.76) (envelope-from ) id 1RkP6o-0000bN-PY for gentoo-user@lists.gentoo.org; Mon, 09 Jan 2012 16:58:35 -0700 Message-ID: <1326135511.20929.5.camel@office-desktop.gateway.2wire.net> Subject: Re: [gentoo-user] How to get raid From: Jeff Cranmer To: gentoo-user@lists.gentoo.org Date: Mon, 09 Jan 2012 13:58:31 -0500 In-Reply-To: <1326056536.15344.3.camel@office-desktop.gateway.2wire.net> References: <1325645839.4553.13.camel@laptop.limeyworld> <4308091.7xnRLljmXt@localhost> <1325825050.5380.30.camel@laptop.limeyworld> <3847798.qPIUxmf7eF@localhost> <1325891080.4278.1.camel@laptop.limeyworld> <1325949066.4278.9.camel@laptop.limeyworld> <1325956808.4278.15.camel@laptop.limeyworld> <4F09E10A.6080505@gmail.com> <1326053001.4443.19.camel@laptop.limeyworld> <1326056536.15344.3.camel@office-desktop.gateway.2wire.net> Content-Type: text/plain; charset="us-ascii" X-Mailer: Evolution 3.2.2 Content-Transfer-Encoding: 7bit Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org Mime-Version: 1.0 X-Identified-User: {793:box347.bluehost.com:lotussev:lotussevencars.com} {sentby:smtp auth 68.221.20.57 authed with jeff@lotussevencars.com} X-Archives-Salt: 44755592-e3cd-4ab6-8597-73df3246c884 X-Archives-Hash: 2cdf0b42c57d2e81575b3dd7c89cf8fe > > > > > > > Success - I managed to get a raid1 device operating. > I created the final filesystem by using mkfs.xfs -f /dev/md0, then > waited for the rebuild to complete before rebooting the system. > > It appears to be created successfully. Now I'll try the same sequence > with sdb and sdc to see if sdc is a good disk. If that works, I'll > retry a raid5 array tomorrow night. > Hmm - it seems to be a bug in RAID5 creation. I can successfully create a RAID1 array either /dev/sdb1 and /dev/sdc1 or /dev/sdb1 and /dev/sdd1 If, however, I try to create a RAID5 array with all three elements, I get /dev/sdc reporting a failure. cat /proc/mdstat fails with the following report. Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] md0 : active raid5 sdd1[3](S) sdc1[1](F) sdb1[0] 2930272256 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/1] [U__] unused devices: Has anyone else experienced similar problems? Is there an extra diagnostic procedure which I can use to validate the sdc drive? Is there something extra I have to do when I go over the 2TB level which could explain this goofy behaviour?