Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265806AbUAMWta (ORCPT ); Tue, 13 Jan 2004 17:49:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265776AbUAMWt3 (ORCPT ); Tue, 13 Jan 2004 17:49:29 -0500 Received: from percy.comedia.it ([212.97.59.71]:3277 "EHLO percy.comedia.it") by vger.kernel.org with ESMTP id S266224AbUAMWm4 (ORCPT ); Tue, 13 Jan 2004 17:42:56 -0500 Date: Tue, 13 Jan 2004 23:42:55 +0100 From: Luca Berra To: Jeff Garzik Cc: Scott Long , Linux Kernel , linux-raid , Neil Brown Subject: Re: Proposed enhancements to MD Message-ID: <20040113224255.GK26643@percy.comedia.it> Mail-Followup-To: Jeff Garzik , Scott Long , Linux Kernel , linux-raid , Neil Brown References: <40033D02.8000207@adaptec.com> <40043C75.6040100@pobox.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <40043C75.6040100@pobox.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1222 Lines: 32 On Tue, Jan 13, 2004 at 01:44:05PM -0500, Jeff Garzik wrote: >And I could have _sworn_ that Neil already posted a patch to do >partitions in md, but maybe my memory is playing tricks on me. he did, and a long time ago also. http://cgi.cse.unsw.edu.au/~neilb/patches/ >IMO, your post/effort all boils down to an open design question: device >mapper or md, for doing stuff like vendor-raid1 or vendor-raid5? And it >is even possible to share (for example) raid5 engine among all the >various vendor RAID5's? I would believe the way to go is having md raid personalities turned into device mapper targets. the issue is that raid personalities need to be able to constantly update the metadata, so a callback must be in place to communicate `exceptions` to a layer that sits above device-mapper and handles metadatas. L. -- Luca Berra -- bluca@comedia.it Communication Media & Services S.r.l. /"\ \ / ASCII RIBBON CAMPAIGN X AGAINST HTML MAIL / \ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/