From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stan Hoeppner Subject: Re: RAID6 Reshape Gone Awry Date: Fri, 03 Aug 2012 13:25:34 -0500 Message-ID: <501C179E.7070709@hardwarefreak.com> References: <8C493F417CC49C6619BBAF45@ryoohko.kodachi.com> <501BB374.9020607@hardwarefreak.com> <501BD420.10203@hesbynett.no> Reply-To: stan@hardwarefreak.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <501BD420.10203@hesbynett.no> Sender: linux-raid-owner@vger.kernel.org To: David Brown Cc: Flynn , Linux RAID List-Id: linux-raid.ids On 8/3/2012 8:37 AM, David Brown wrote: > On 03/08/2012 13:18, Stan Hoeppner wrote: >> The primary function of RAID is to protect your data in the event of a >> _disk_ failure. Creating multiple arrays from _partitions_ on the same >> set of physical disks does nothing to protect one from disk failure. >> > > That's not how I understand the disk layout - if I'm right, it is still > a monstrosity, but one that will offer protection on disk failure. I didn't state this setup would not protect data from disk failure. I stated that a single array would have done that. Making 9 more simply causes all kinds of problems without any additional benefits. -- Stan