From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rudy Zijlstra Subject: Re: Triple parity and beyond Date: Mon, 25 Nov 2013 00:28:15 +0100 Message-ID: <52928B8F.3080804@grumpydevil.homelinux.org> References: <528A90B7.5010905@zytor.com> <528AA1EB.3010909@zytor.com> <528BCA2D.5010500@redhat.com> <73BEB41F-0FAC-4108-BEA9-DB6D921F6F55@cs.utk.edu> <528D61C5.70902@hardwarefreak.com> <528DADB1.8010604@hardwarefreak.com> <528E8FEC.2070204@hardwarefreak.com> <20131123100753.1820ab7c@notabene.brown> <5290252A.8020508@hardwarefreak.com> <20131123160428.6f1c5898@notabene.brown> <2013112 3181208.5103bee4@notabene.brown> <52917AA8.1040300@hardwarefreak.com> <52926BE3.1000301@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: <52926BE3.1000301@hardwarefreak.com> Sender: linux-raid-owner@vger.kernel.org To: stan@hardwarefreak.com Cc: John Williams , NeilBrown , James Plank , Ric Wheeler , Andrea Mazzoleni , "H. Peter Anvin" , Linux RAID Mailing List , Btrfs BTRFS , David Brown , David Smith List-Id: linux-raid.ids On 24-11-13 22:13, Stan Hoeppner wrote: > I freely admit I may have drawn an incorrect conclusion about md > parity rebuild performance based on incomplete data. I simply don't > recall anyone stating here in ~3 years that their parity rebuilds were > speedy, but quite the opposite. I guess it's possible that each one of > those cases was due to another factor, such as user load, slow CPU, > bus bottleneck, wonky disk firmware, backplane issues, etc. The other part to this is, that the list sees what goes wrong. The cases where a replacement goes smoothly do not reach the list Cheers, Rudy