From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 3 Apr 2001 12:10:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 3 Apr 2001 12:10:12 -0400 Received: from web5203.mail.yahoo.com ([216.115.106.97]:50706 "HELO web5203.mail.yahoo.com") by vger.kernel.org with SMTP id ; Tue, 3 Apr 2001 12:10:00 -0400 Message-ID: <20010403160919.14357.qmail@web5203.mail.yahoo.com> Date: Tue, 3 Apr 2001 09:09:19 -0700 (PDT) From: Rob Landley Subject: SIS 5513/IBM Deskstar HDIO_SET_DMA Operation not permitted? To: linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 2.2 allowed me to set DMA on an SIS 5513 using an IBM Deskstar 40 gig IDE. 2.4 goes "Operation not permitted" when I try it. Why? I hit it with ide0=ata66 in lilo, and it sped up from 3 megs/sec to 5 megs/second, but I used to get 12. hdparm /dev/hda still says I'm not using DMA. I realise I'm doing dangerous stuff here to get the performance back. I'm just curious why it's not doing it for me. (Is there a known problem I should be worried about?) Let's see, ide0=dma,ata66... right? Should I be really really worried about my data integrity if I do this? It never had a problem under 2.2... Rob __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/