From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNHXj9V211749 for ; Thu, 23 Dec 2010 11:33:45 -0600 Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2DCBC21C20E for ; Thu, 23 Dec 2010 09:35:42 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id 9qkFuW82ULyZEujP for ; Thu, 23 Dec 2010 09:35:42 -0800 (PST) Date: Thu, 23 Dec 2010 18:35:31 +0100 From: Emmanuel Florac Subject: Re: able to mount a fs, unable to repair it Message-ID: <20101223183531.19464601@galadriel.home> In-Reply-To: <87r5d9uuez.fsf@ezri.u-picardie.fr> References: <87r5d9uuez.fsf@ezri.u-picardie.fr> Mime-Version: 1.0 List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: laurent+xfs@u-picardie.fr Cc: xfs@oss.sgi.com Le Thu, 23 Dec 2010 02:53:08 +0100 vous =E9criviez: > For a reason all my xfs FS got corrupted at the same time. > My setup is: xen host using lvm on top of soft raid6 on top of jbod > 3ware connected sata disks. > Both the host and the VM fs got corrupted. RAID-6 is extremely stable on the 3Ware, while software RAID-6 is dubbed experimental in the kernel. Software RAID can provide seducely high performance when running benchmarks, but IMO it doesn't fly when you need your CPU to do some other jobs, like running NFS daemons or even worse, VMs. Under high CPU loads concurrently coming from the software RAID and virtualisation stack, so many things may go wrong... My advice : software RAID stinks under high CPU load/ high IO. Use hardware RAID whenever possible because it provides more predictable performance and remove many weird software interactions from the picture. -- = ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs