Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 10 Jul 2001 02:38:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 10 Jul 2001 02:38:00 -0400 Received: from zeus.kernel.org ([209.10.41.242]:42713 "EHLO zeus.kernel.org") by vger.kernel.org with ESMTP id ; Tue, 10 Jul 2001 02:37:58 -0400 Date: Mon, 9 Jul 2001 23:37:33 -0700 (PDT) From: Andre Hedrick To: "M.H.VanLeeuwen" cc: linux-kernel@vger.kernel.org Subject: Re: Does kernel require IDE enabled in BIOS to access HD, FS errors? In-Reply-To: <3B4A7972.F0CFBACE@megsinet.net> Message-ID: 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 There appears to be a max-pio sync error. Specifically PIO is used to setup all transfers regardless of DMA/Multi/PIO and if that is wrong the the rest is toast. CMD has the strangest interlace of PIO ever. PIO can only as hast as the slowest device. I need to think about this some more, kick me to keep me on task. Cheers, On Mon, 9 Jul 2001, M.H.VanLeeuwen wrote: > Andre, > > I had a chance to play a little more today, here is what I've come up with: > > a. w/ hdc disable in BIOS, changing the PIO mode to 0 or 1 seems to allow the > system to run error free. PIO mode 3 still has silent FS corruption issues. > > b. w/ hdc enabled in BIOS, the PIO mode doesn't seem to matter. (except for speed;) > > c. CONFIG_IDEDMA_PCI_AUTO affects the number of interrupts needed to complete > each block xfer. With it enabled the number of IRQ's per second ~600. > With it disabled ~2/block or 5000-6000 per second. I thought from the dmesg > output that DMA was disabled and this option should have no affect. > > > CMD646: IDE controller on PCI bus 00 dev 10 > > CMD646: chipset revision 1 > > CMD646: not 100% native mode: will probe irqs later > > CMD646: chipset revision 0x01, MultiWord DMA Limited, IRQ workaround enabled > > CMD646: simplex device: DMA disabled > > ide0: CMD646 Bus-Master DMA disabled (BIOS) > > CMD646: simplex device: DMA disabled > > ide1: CMD646 Bus-Master DMA disabled (BIOS) > > d. CONFIG_IDEDMA_PCI_AUTO does not seem to affect the outcome of "a" or "b" above. > > Martin > > andre@linux-ide.org wrote: > > > > Martin, you have an old beast that there are problems in how the chipset > > was deployed. > > How are you confirming the corruption against the various layers in the > > kernel? > > If you would like patches & tests to verify I will send them to you. > > > > Cheers > > > > -- > > Andre Hedrick > > Linux ATA Development > > ASL Kernel Development > > ----------------------------------------------------------------------------- > > ASL, Inc. Toll free: 1-877-ASL-3535 > > 1757 Houret Court Fax: 1-408-941-2071 > > Milpitas, CA 95035 Web: www.aslab.com > Andre Hedrick Linux ATA Development ASL Kernel Development ----------------------------------------------------------------------------- ASL, Inc. Toll free: 1-877-ASL-3535 1757 Houret Court Fax: 1-408-941-2071 Milpitas, CA 95035 Web: www.aslab.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/