From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764344AbXGFR6l (ORCPT ); Fri, 6 Jul 2007 13:58:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760619AbXGFR6e (ORCPT ); Fri, 6 Jul 2007 13:58:34 -0400 Received: from rtr.ca ([64.26.128.89]:3125 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759236AbXGFR6e (ORCPT ); Fri, 6 Jul 2007 13:58:34 -0400 Message-ID: <468E82C8.7060204@rtr.ca> Date: Fri, 06 Jul 2007 13:58:32 -0400 From: Mark Lord User-Agent: Thunderbird 2.0.0.4 (X11/20070604) MIME-Version: 1.0 To: Robert Hancock Cc: Christoph Pleger , linux-kernel@vger.kernel.org Subject: Re: PATA-disk named sda References: <468E5420.7090605@shaw.ca> In-Reply-To: <468E5420.7090605@shaw.ca> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Robert Hancock wrote: >.. > Currently the DMA, multi-sector mode, etc. are not controllable with > hdparm with libata. libata is designed to use the fastest settings > possible by default. In a lot of cases this messing with hdparm was only > needed because of stupidity with the old IDE code (like DMA not being > automatically enabled if the low-level driver was built modular). Actually, most of the hdparm flags were put there to help test the IDE subsystem and to help debug the much stranger hardware it had to deal with. "DMA off by default" was a Linus Torvalds request, to help ensure data safety with all of the weird and wonderful crap pre-standardization. Cheers