From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 23 May 2002 18:43:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 23 May 2002 18:43:08 -0400 Received: from twilight.ucw.cz ([195.39.74.230]:42146 "EHLO twilight.ucw.cz") by vger.kernel.org with ESMTP id ; Thu, 23 May 2002 18:43:04 -0400 Date: Fri, 24 May 2002 00:42:58 +0200 From: Vojtech Pavlik To: Martin Dalecki Cc: "Gryaznova E." , Linux Kernel , Reiserfs developers mail-list Subject: Re: IDE problem: linux-2.5.17 Message-ID: <20020524004258.D27005@ucw.cz> In-Reply-To: <3CECF59B.D471F505@namesys.botik.ru> <3CECFA15.8040707@evision-ventures.com> <3CED2B73.ABA3C95F@namesys.botik.ru> <3CED2FE0.2050903@evision-ventures.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 23, 2002 at 08:07:28PM +0200, Martin Dalecki wrote: > > I have 40 wires cable. When ide=nodma is passed to 2.5.17 kernel - kernel boots. > > Am I correct that it is not possible to have DMA on with such cable? > > Is there any reason for doing that? > > > > Note that bus speed is 33 MHz when kernel fails to boot. > > I mean - how do I specify slower bus speed: 22 MHz? > > You know what? I don't answer you directly I will just put a note > about this in to Documentation/ide.txt which is long overdue anyway :-). > You should better don't do UDMA>>66 with 40 write cablings. That's all. The kernel shouldn't select that automatically. If it does, it's a bug. As for manual setting, it should emit a warning. -- Vojtech Pavlik SuSE Labs