Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763151AbXEQHYo (ORCPT ); Thu, 17 May 2007 03:24:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754957AbXEQHYf (ORCPT ); Thu, 17 May 2007 03:24:35 -0400 Received: from mailer.gwdg.de ([134.76.10.26]:52036 "EHLO mailer.gwdg.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752277AbXEQHYe (ORCPT ); Thu, 17 May 2007 03:24:34 -0400 Date: Thu, 17 May 2007 09:21:45 +0200 (MEST) From: Jan Engelhardt To: Jeff Zheng cc: david@lang.hm, Andreas Dilger , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: RE: Software raid0 will crash the file-system, when each disk is 5TB In-Reply-To: <659F626D666070439A4A5965CD6EBF406B3324@gazelle.ad.endace.com> Message-ID: References: <659F626D666070439A4A5965CD6EBF406836C6@gazelle.ad.endace.com> <20070516140452.GC5286@schatzie.adilger.int> <659F626D666070439A4A5965CD6EBF406B3324@gazelle.ad.endace.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam-Report: Content analysis: 0.0 points, 6.0 required _SUMMARY_ Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 813 Lines: 21 On May 17 2007 09:42, Jeff Zheng wrote: > >Problem is that is only happens when you actually write data to the >raid. You need the actual space to reproduce the problem. That should not be a big problem. Create like 4x950G virtual sparse drives (takes roughly or so 4x100 MB on the host after mkfs), then set up a raid inside the vm, with which you can play - even write to it. Not sure how RAID5 will affect the host size of the virtual drives, since during first resync when all disks are blank, it will XOR it (0^0=1), and hence fills up the host disk. Jan -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/