From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:54950 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753506AbaCXTRY (ORCPT ); Mon, 24 Mar 2014 15:17:24 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1WSAN7-0003I3-SG for linux-btrfs@vger.kernel.org; Mon, 24 Mar 2014 20:17:21 +0100 Received: from cpc21-stap10-2-0-cust974.12-2.cable.virginm.net ([86.0.163.207]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 24 Mar 2014 20:17:21 +0100 Received: from m_btrfs by cpc21-stap10-2-0-cust974.12-2.cable.virginm.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 24 Mar 2014 20:17:21 +0100 To: linux-btrfs@vger.kernel.org From: Martin Subject: Re: Btrfs and raid5 status with kernel 3.14, documentation, and howto Date: Mon, 24 Mar 2014 19:17:12 +0000 Message-ID: References: <20140323225657.GA17039@merlins.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 In-Reply-To: <20140323225657.GA17039@merlins.org> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 23/03/14 22:56, Marc MERLIN wrote: > Ok, thanks to the help I got from you, and my own experiments, I've > written this: > http://marc.merlins.org/perso/btrfs/post_2014-03-23_Btrfs-Raid5-Status.html > > If someone reminds me how to edit the btrfs wiki, I'm happy to copy that > there, or give anyone permission to take part of all of what I wrote > and use it for any purpose. > > > > The highlights are if you're coming from the mdadm raid5 world: [---] > > Hope this helps, > Marc Thanks for the very good summary. So... In very brief summary, btrfs raid5 is very much a work in progress. Question: Is the raid5 going to be seamlessly part of the error-correcting raids whereby raid5, raid6, raid-with-n-redundant-drives are all coded as one configurable raid? Also (second question): What happened to the raid naming scheme that better described the btrfs-style of raid by explicitly numbering the number of devices used for mirroring, striping, and error-correction? Thanks, Martin