Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 10 Sep 2002 10:17:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 10 Sep 2002 10:17:45 -0400 Received: from pc1-cwma1-5-cust128.swa.cable.ntl.com ([80.5.120.128]:31997 "EHLO irongate.swansea.linux.org.uk") by vger.kernel.org with ESMTP id ; Tue, 10 Sep 2002 10:17:44 -0400 Subject: Re: [RFC] Multi-path IO in 2.5/2.6 ? From: Alan Cox To: "Cameron, Steve" Cc: linux-kernel@vger.kernel.org In-Reply-To: <45B36A38D959B44CB032DA427A6E1064012814A8@cceexc18.americas.cpqcorp.net> References: <45B36A38D959B44CB032DA427A6E1064012814A8@cceexc18.americas.cpqcorp.net> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Ximian Evolution 1.0.8 (1.0.8-6) Date: 10 Sep 2002 15:25:32 +0100 Message-Id: <1031667932.31554.58.camel@irongate.swansea.linux.org.uk> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 975 Lines: 19 On Tue, 2002-09-10 at 15:06, Cameron, Steve wrote: > We can use the md driver for this. However, we cannot boot from > such a multipath device. Lilo and grub do not understand md multipath > devices, nor do anaconda or other installers. (Enhancing all of those, > I'd like to avoid. Cramming multipath i/o into the low level driver > would accomplish that, but, too yucky.) > > If there is work going on to enhance the multipath support in linux > it would be nice if you could boot from and install to such devices. Booting from them is a BIOS matter. If the BIOS can do the block loads off the multipath device we can do the rest. The probe stuff can be done in the boot initrd - as some vendors handle raid for example. - 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/