From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265275AbUGSPoi (ORCPT ); Mon, 19 Jul 2004 11:44:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265287AbUGSPoi (ORCPT ); Mon, 19 Jul 2004 11:44:38 -0400 Received: from web41110.mail.yahoo.com ([66.218.93.26]:7095 "HELO web41110.mail.yahoo.com") by vger.kernel.org with SMTP id S265275AbUGSPo0 (ORCPT ); Mon, 19 Jul 2004 11:44:26 -0400 Message-ID: <20040719154425.8372.qmail@web41110.mail.yahoo.com> Date: Mon, 19 Jul 2004 08:44:25 -0700 (PDT) From: Malik Ali Subject: How do I enable UDMA mode of IDE on Promise FastTrak100 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 I had install RH8 with Promise Fasttrak100 driver. I had followed the instruction as mentioned in readme of driver downloaded from intel download center. I had Intel S845WD1-E board with on board PDC20267 controller. The installation completed without hickups. I found /dev/sda as my Raid-0 device and finally I mounted the ext3 filesystem on it. But the Problem is that I didn't get the performance from raid-0 device even poor performance then regular non-raid device. However here is part of dmesg ... Kernel command line: ro root=LABEL=/ ide0=0x1f0,0x3f6 ide1=0x170,0x376 ide2=0 ide3=0 ide4=0 ide5=0 ide6=0 ide7=0 ide8=0 ide9=0 ... ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hdaMA, hdbMA PDC20267: IDE controller on PCI bus 02 dev 70 PCI: Found IRQ 9 for device 02:0e.0 PDC20267: chipset revision 2 PDC20267: not 100% native mode: will probe irqs later PDC20267: (U)DMA Burst Bit ENABLED Primary MASTER Mode Secondary MASTER Mode. PDC20267: too many IDE interfaces, no room in table PDC20267: too many IDE interfaces, no room in table PDC20267: neither IDE port enabled (BIOS) ... --> Look at last three lines, isn't questionable? Why these two ides got room in table? Why neither IDE port enabled (BIOS)? now look here # cat /proc/ide/pdc202xx PDC20267 Chipset. ------------------------------- General Status --------------------------------- Burst Mode : enabled Host Mode : Normal Bus Clocking : 66 External IO pad select : 10 mA Status Polling Period : 0 Interrupt Check Status Polling Delay : 0 --------------- Primary Channel ---------------- Secondary Channel ------------- enabled enabled 66 Clocking disabled disabled Mode MASTER Mode MASTER FIFO Empty FIFO Empty --------------- drive0 --------- drive1 -------- drive0 ---------- drive1 ------ DMA enabled: no no no no DMA Mode: UDMA 4 NOTSET UDMA 4 NOTSET PIO Mode: PIO 4 NOTSET PIO 4 NOTSET --> DMA enabled no no ...? Wht I feel that if I somehow I enabled DMA i might get the performance. please any one could help me it will be appreciateable. If my arguments are wrong plz let me correct. THX MALIK __________________________________ Do you Yahoo!? Vote for the stars of Yahoo!'s next ad campaign! http://advision.webevents.yahoo.com/yahoo/votelifeengine/