Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764253AbXHPK7Y (ORCPT ); Thu, 16 Aug 2007 06:59:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759726AbXHPK66 (ORCPT ); Thu, 16 Aug 2007 06:58:58 -0400 Received: from linux.dunaweb.hu ([62.77.196.1]:56221 "EHLO linux.dunaweb.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758052AbXHPK6z convert rfc822-to-8bit (ORCPT ); Thu, 16 Aug 2007 06:58:55 -0400 Message-ID: <46C42DD6.5090200@dunaweb.hu> Date: Thu, 16 Aug 2007 12:58:30 +0200 From: Zoltan Boszormenyi User-Agent: Thunderbird 1.5.0.12 (X11/20070719) MIME-Version: 1.0 To: Michal Piotrowski Cc: linux-kernel , IDE/ATA development list Subject: Re: Bad CD disk disables IDE DMA References: <46C2F526.30005@dunaweb.hu> <6bffcb0e0708160117m31b6edc6ta277b6ddf2d894f6@mail.gmail.com> In-Reply-To: <6bffcb0e0708160117m31b6edc6ta277b6ddf2d894f6@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5064 Lines: 125 Michal Piotrowski ?rta: > Hi Zoltan, > > On 15/08/07, Zoltan Boszormenyi wrote: > >> Hi, >> >> I noticed that a bad CD of mine makes DMA disabled: >> >> hda: selected mode 0x44 >> hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } >> hda: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } >> ide: failed opcode was: unknown >> hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } >> hda: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } >> ide: failed opcode was: unknown >> hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } >> hda: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } >> ide: failed opcode was: unknown >> hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } >> hda: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } >> ide: failed opcode was: unknown >> hda: DMA disabled >> hda: ide_intr: huh? expected NULL handler on exit >> hda: ATAPI reset complete >> >> Every time I put the said CD into to drive and DMA is on, I get the >> above messages. >> > > This might be intended. > Might be. Note however, that there are no "cdrom_decode_status: " lines when the drive is not using DMA. The disk is the same in both cases. I don't know too much about ATAPI, but shouldn't it report the same errors no matter how the commands are passed to the drive? I tried to make it using DMA after mounting the "faulty" disk and copying it. The same errors occured in the logs when dd started reading but it actually finished reading: $ LANG=C dd if=/dev/hda of=image.iso bs=2048 dd: reading `/dev/hda': Input/output error 298106+0 records in 298106+0 records out 610521088 bytes (611 MB) copied, 144.349 seconds, 4.2 MB/s The file is a bit larger than what isosize reports about it but IIRC it's expected. So, if the disk is actually faulty dd would drop dead and not able to read the disk. Or something is not quite right in the ide-cd driver. The "DMA disabled" message comes when the drive should spin up the disk. Isn't there a timeout error somewhere? Hm. Thinking about it a bit more upon mount the same is happening - before the disk is spun up the error shows up in the logs and it switches to PIO. Does it ring a bell to someone? >> Two things are interesting: first, it gets mounted correctly and >> readable and >> second, when DMA was already disabled no such messages occur in the logs. >> Anyhow, I would need DMA to correctly burn CDs/DVDs... >> What can I do besides manually re-enable DMA? >> All other disks I have tried behave perfectly. >> This happened on 2.6.22[-rcX], 2.6.23-rc3-git1 and 2.6.20-1.2962.fc6. >> This is on a Fedora Core 6 system. CD/DVD is using the old IDE drivers: >> >> Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 >> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx >> NFORCE-MCP55: IDE controller at PCI slot 0000:00:04.0 >> NFORCE-MCP55: chipset revision 161 >> NFORCE-MCP55: not 100% native mode: will probe irqs later >> NFORCE-MCP55: BIOS didn't set cable bits correctly. Enabling workaround. >> NFORCE-MCP55: 0000:00:04.0 (rev a1) UDMA133 controller >> ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:DMA >> Probing IDE interface ide0... >> hda: PIONEER DVD-RW DVR-111L, ATAPI CD/DVD-ROM drive >> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 >> Probing IDE interface ide1... >> ide-floppy driver 0.99.newide >> >> $ cat /proc/ide/amd74xx >> ----------AMD BusMastering IDE Configuration---------------- >> Driver Version: 2.13 >> South Bridge: 0000:00:04.0 >> Revision: IDE 0xa1 >> Highest DMA rate: UDMA133 >> BM-DMA base: 0xf000 >> PCI clock: 33.3MHz >> -----------------------Primary IDE-------Secondary IDE------ >> Prefetch Buffer: yes yes >> Post Write Buffer: yes yes >> Enabled: yes no >> Simplex only: no yes >> Cable Type: 80w 80w >> -------------------drive0----drive1----drive2----drive3----- >> Transfer Mode: PIO DMA DMA DMA >> Address Setup: 30ns 90ns 90ns 90ns >> Cmd Active: 90ns 90ns 300ns 300ns >> Cmd Recovery: 30ns 30ns 300ns 300ns >> Data Active: 90ns 330ns 330ns 330ns >> Data Recovery: 30ns 270ns 270ns 270ns >> Cycle Time: 120ns 600ns 600ns 600ns >> Transfer Rate: 16.6MB/s 3.3MB/s 3.3MB/s 3.3MB/s >> >> Best regards, >> Zolt?n B?sz?rm?nyi >> > > Regards, > Michal > > Best regards, Zolt?n - 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/