From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stan Hoeppner Subject: Re: potentially lost largeish raid5 array.. Date: Mon, 26 Sep 2011 22:53:35 -0500 Message-ID: <4E8148BF.5090406@hardwarefreak.com> References: <201109221950.36910.tfjellstrom@shaw.ca> <201109231022.59437.tfjellstrom@shaw.ca> <4E7D152C.9080704@hardwarefreak.com> <201109231811.08061.tfjellstrom@shaw.ca> <4E7DCA66.4000705@hardwarefreak.com> <4E7E079C.4020802@hardwarefreak.com> <4E7F3D24.5050300@hardwarefreak.com> <4E7FC042.7040109@hardwarefreak.com> <4E80D815.9080005@hardwarefreak.com> <1317079695.27455.1.camel@oxygen.netxsys.com> Reply-To: stan@hardwarefreak.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1317079695.27455.1.camel@oxygen.netxsys.com> Sender: linux-raid-owner@vger.kernel.org To: Krzysztof Adamski Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 9/26/2011 6:28 PM, Krzysztof Adamski wrote: > On Mon, 2011-09-26 at 14:52 -0500, Stan Hoeppner wrote: >> Coincidentally, recent versions of mkfs.xfs will read the mdadm >> config >> and build the filesystem correctly, automatically, on top of striped >> md >> raid arrays. > > If I have LVM on top of RAID6, will mkfs.xfs read the mdadm config? I believe the correct answer is that it should, but it depends on a few things. Support for this may be new enough that some/many distros won't do it out of the box. You may need to build some code yourself, linked with the proper libraries. See the following list thread for background, which is a year old, so you may want to ask this question directly on the XFS list, or see the XFS FAQ: http://oss.sgi.com/archives/xfs/2010-09/msg00161.html http://xfs.org/index.php/XFS_FAQ -- Stan