From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266827AbUGLN1S (ORCPT ); Mon, 12 Jul 2004 09:27:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266828AbUGLN1R (ORCPT ); Mon, 12 Jul 2004 09:27:17 -0400 Received: from mail.eris.qinetiq.com ([128.98.1.1]:14892 "HELO mail.eris.qinetiq.com") by vger.kernel.org with SMTP id S266820AbUGLN0e convert rfc822-to-8bit (ORCPT ); Mon, 12 Jul 2004 09:26:34 -0400 From: Mark Watts Organization: QinetiQ To: linux-kernel@vger.kernel.org Subject: Re: HDIO_SET_DMA failed on a Dell Latitude C400 Laptop Date: Mon, 12 Jul 2004 14:22:00 +0100 User-Agent: KMail/1.6.1 References: <200407121407.14428.m.watts@eris.qinetiq.com> In-Reply-To: <200407121407.14428.m.watts@eris.qinetiq.com> MIME-Version: 1.0 Content-Disposition: inline Content-Type: Text/Plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Message-Id: <200407121422.00841.m.watts@eris.qinetiq.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > I've just burnt a cd for the first time on a Dell Latitude C400 laptop and > I noticed that the system was quite sluggish while the burn was happening. > (mouse pointer erratic, window redraw slow etc). > > Remembering a similar issue with a desktop system, I did the following to > enable DMA on the hard drive (hdparm was giving ~3MB/sec read) > > # hdparm -c1 -d1 /dev/hda > > /dev/hda > setting 32-bit IO_support flag to 1 > setting using_dma to 1 (on) > HDIO_SET_DMA failed: Operation not permitted > IO_support = 1 (32-bit) > using_dma = 0 (off) > > > hdparm now reports ~7MB/sec which is better but still prety poor. > > > Any ideas why I couldn't set DMA on the drive? > > > CPU = Mobile Pentum 3 @1.2GHz (800MHz when booted with no power cord) > Ram = 256MB > HDD = IBM Travelstar (IC25N020ATDA04-0) 20GB > BIOS Rev = A12 Kernel is a 2.6.7 kernel... - -- Mark Watts Senior Systems Engineer QinetiQ Trusted Information Management Trusted Solutions and Services group GPG Public Key ID: 455420ED -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFA8pB4Bn4EFUVUIO0RAjmoAJ93XBQpvOhfi3PNWvNDIHDvT6WASQCcDmlI TI0LXhd4IxLKE6sMK3W7mls= =rzX2 -----END PGP SIGNATURE-----