From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263017AbTJJRQm (ORCPT ); Fri, 10 Oct 2003 13:16:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263068AbTJJRQm (ORCPT ); Fri, 10 Oct 2003 13:16:42 -0400 Received: from email.careercast.com ([216.39.101.233]:62936 "HELO email.careercast.com") by vger.kernel.org with SMTP id S263017AbTJJRQl (ORCPT ); Fri, 10 Oct 2003 13:16:41 -0400 Subject: Re: 2.7 thoughts From: Matt Simonsen To: Stuart Longland Cc: linux-kernel@vger.kernel.org In-Reply-To: <3F864F82.4050509@longlandclan.hopto.org> References: <20031009115809.GE8370@vega.digitel2002.hu> <20031009165723.43ae9cb5.skraw@ithnet.com> <3F864F82.4050509@longlandclan.hopto.org> Content-Type: text/plain Organization: Message-Id: <1065805958.2806.22.camel@mattswrk.cbd.careercast.com> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-4) Date: 10 Oct 2003 10:12:39 -0700 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2003-10-09 at 23:19, Stuart Longland wrote: > - Software RAID 0+1 perhaps? > > A lot of hardware RAID cards support it, why not the > kernel? By RAID 0+1 I mean mirror-RAIDing two (or more) stripe-RAID > arrays. (Or can this be done already?) You can do this now (as you rightly suspected). Just create 2 raid 0 arrays (md0, md1). From there create md2 as a RAID1 array using /dev/md0 and /dev/md1. Create the filesystem and you've got yourself RAID 0+1. You can do RAID 5+0 or any other wild combo you could think of. Matt