Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756369AbXEQPeh (ORCPT ); Thu, 17 May 2007 11:34:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754356AbXEQPe2 (ORCPT ); Thu, 17 May 2007 11:34:28 -0400 Received: from mailer.gwdg.de ([134.76.10.26]:42992 "EHLO mailer.gwdg.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753863AbXEQPe1 (ORCPT ); Thu, 17 May 2007 11:34:27 -0400 Date: Thu, 17 May 2007 17:30:26 +0200 (MEST) From: Jan Engelhardt To: Neil Brown cc: Jeff Zheng , 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: <17996.14421.769180.782589@notabene.brown> Message-ID: References: <659F626D666070439A4A5965CD6EBF406836C6@gazelle.ad.endace.com> <20070516140452.GC5286@schatzie.adilger.int> <659F626D666070439A4A5965CD6EBF406B3324@gazelle.ad.endace.com> <17996.14421.769180.782589@notabene.brown> 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: 784 Lines: 32 On May 17 2007 21:11, Neil Brown wrote: >On Thursday May 17, jengelh@linux01.gwdg.de wrote: >> XOR it (0^0=1), and hence fills up the host disk. > >Uhmm... you need to check your maths. > >$ perl -e 'printf "%d\n", 0^0;' >0 > >:-) (ouch) You know just as I that ^ is the power operator! I just... wrongly named it XOR :p $ echo '0^0' | bc -l 1 Well, right, setting up a blank raid5 array inside vmware will not make the host file significantly larger, making it easy to build megatera arrays with gigabyte range host disks. 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/