From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263891AbTLYHH6 (ORCPT ); Thu, 25 Dec 2003 02:07:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264132AbTLYHH6 (ORCPT ); Thu, 25 Dec 2003 02:07:58 -0500 Received: from neon-gw-l3.transmeta.com ([63.209.4.196]:33805 "EHLO neon-gw.transmeta.com") by vger.kernel.org with ESMTP id S263891AbTLYHH5 (ORCPT ); Thu, 25 Dec 2003 02:07:57 -0500 To: linux-kernel@vger.kernel.org From: "H. Peter Anvin" Subject: md: RAID-6 patch available for testing Date: 24 Dec 2003 23:07:51 -0800 Organization: Transmeta Corporation, Santa Clara CA Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Disclaimer: Not speaking for Transmeta in any way, shape, or form. Copyright: Copyright 2003 H. Peter Anvin - All Rights Reserved Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org [Already announced to linux-raid, but I thought it might get wider distribution in this list.] For those that don't know, I've been working on adding RAID-6 (dual failure recovery) to the md system for a while. It started out as a project because the math was interesting, and Penguin Computing for donated a very much needed test system (thanks!) Well, at least I have a piece of code that passes my relatively simple functionality tests. Still, that's news, and this is the first RAID-6 snapshot that isn't *known* to be broken :) I can at least mount filesystems, read and write data, reboot the system and have the data still there, with 1 or 2 disks lost, and do a reconstruction once the drives are added back in. New development snapshot at: ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/raid6-20031224c-experimental.tar.gz Please test it out and let me know how badly it sucks :) At some point I'll try to run some benchmarks. There is also a lot of optimization still to be done. -hpa -- at work, in private! If you send me mail in HTML format I will assume it's spam. "Unix gives you enough rope to shoot yourself in the foot." Architectures needed: ia64 m68k mips64 ppc ppc64 s390 s390x sh v850 x86-64