From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934879AbXLQXtS (ORCPT ); Mon, 17 Dec 2007 18:49:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S936689AbXLQXsm (ORCPT ); Mon, 17 Dec 2007 18:48:42 -0500 Received: from mail.gatrixx.com ([217.111.11.44]:51162 "EHLO mail.gatrixx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936636AbXLQXsl (ORCPT ); Mon, 17 Dec 2007 18:48:41 -0500 Message-ID: <476709C9.9020503@j-o-a.de> Date: Tue, 18 Dec 2007 00:44:09 +0100 From: Oliver Joa User-Agent: Icedove 1.5.0.10 (X11/20070329) MIME-Version: 1.0 To: Lennart Sorensen Cc: linux-kernel@vger.kernel.org Subject: Re: How to Switch DMA off for only one Harddisk at Kernelboot References: <4765690C.6010605@j-o-a.de> <20071217223225.GF2310@csclub.uwaterloo.ca> In-Reply-To: <20071217223225.GF2310@csclub.uwaterloo.ca> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Lennart Sorensen wrote: [...] > Isn't it more a matter of having a CF card that does do DMA and a > controller that does DMA, but a CF to IDE adapter that does not do DMA? > > If it is really a case of a CF card that claims to do DMA but is > unstable if you try (I have found one model that does so), then it > should simply be added to the ide dma blacklist instead. Maybe I will try this also, but for the moment it is running. > I blacklisted 'SMART CF' on my system since they have random read errors > and other i/o errors whenever DMA is enabled (while other cards work > fine with DMA enabled). They claim to do DMA, but sure don't seem to do > so reliably on this system. SiliconDrive CF works perfectly with DMA on > the same system. It is working now with "hda=nodma" on kernel 2.6.24-rc5. Thanks to Bartlomiej Zolnierkiewicz who gave me the hint to use the newest kernel. Thanks to all. Olli