From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264269AbTLES3o (ORCPT ); Fri, 5 Dec 2003 13:29:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264271AbTLES3o (ORCPT ); Fri, 5 Dec 2003 13:29:44 -0500 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:46780 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S264269AbTLES3n (ORCPT ); Fri, 5 Dec 2003 13:29:43 -0500 Message-ID: <3FD0CE84.8060902@pobox.com> Date: Fri, 05 Dec 2003 13:29:24 -0500 From: Jeff Garzik User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030703 X-Accept-Language: en-us, en MIME-Version: 1.0 To: "Kevin P. Fleming" CC: LKML Subject: Re: Serial ATA (SATA) for Linux status report References: <20031203204445.GA26987@gtf.org> <20031204081732.GC5376@launay.org> <3FCF4C32.5040101@pobox.com> <200312051842.26599.marchand@kde.org> <3FD0C4B0.8020106@pobox.com> <3FD0CB76.4000202@backtobasicsmgmt.com> In-Reply-To: <3FD0CB76.4000202@backtobasicsmgmt.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Kevin P. Fleming wrote: > Jeff Garzik wrote: > >> Yes, a tested patch would be great, thanks! >> > > (hijacking this subthread, sorry) > > Jeff, you mentioned in the status report "don't remove an operating disk > from an ICH5, hotplug is not supported". > > Does this mean hardware damage, or just serious libata/ICH5 confusion? > I've got a six-disk server here with two disks on an ICH5 and four on an > SATA150 TX4, and I really would like to be able to hot-replace a disk in > case of a failure. If the ICH5 cannort support this, I'm going to have > to get a 3ware card. _Probably_ no hardware damage, but I do not know for sure. I do not it will likely lockup, and data corruption is also a possibility. As I mentioned in another email, ICH5 hardware does not support hot removal. HOWEVER. If the OS driver is given sufficient notice, it can shut down the port, and the sysadmin may then unplug the SATA cable. As a tangent, your TX4 hardware fully supports hotplug, but libata does not yet support it. Jeff