From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ns.bouton.name ([109.74.195.142]:40542 "EHLO mail.bouton.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752964AbbJNUeI (ORCPT ); Wed, 14 Oct 2015 16:34:08 -0400 Subject: Re: RAID6 stable enough for production? To: Donald Pearson , Sjoerd References: <2402569.dCkKzGyGNU@hoefnix> Cc: Btrfs BTRFS From: Lionel Bouton Message-ID: <561EBC3D.8060004@bouton.name> Date: Wed, 14 Oct 2015 22:34:05 +0200 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: Le 14/10/2015 22:23, Donald Pearson a écrit : > I would not use Raid56 in production. I've tried using it a few > different ways but have run in to trouble with stability and > performance. Raid10 has been working excellently for me. Hi, could you elaborate on the stability and performance problems you had? Which kernels were you using at the time you were testing? I'm interested because I have some RAID10 installations of 7 disks which don't need much write performance (large backup servers with few clients and few updates but very large datasets) that I plan to migrate to RAID6 when they approach their storage capacity (at least theoretically with 7 disks this will give better read performance and better protection against disk failures). 3.19 brought full RAID5/6 support and from what I remember there were some initial quirks but I'm unaware of any big RAID5/6 problem in 4.1+ kernels. Best regards, Lionel