Date: Tue, 13 Jan 2004 11:37:50 -0600 From: Jon Noack <noackjr@compgeek.com> To: Doug White <dwhite@gumbysoft.com> Cc: current@freebsd.org Subject: Re: 5.2-RELEASE: unable to mount cd-roms Message-ID: <40042CEE.5000709@compgeek.com> In-Reply-To: <20040113092043.P63000@carver.gumbysoft.com> References: <4003AE67.1050704@compgeek.com> <20040113092043.P63000@carver.gumbysoft.com>
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On 1/13/2004 11:23 AM, Doug White wrote: > On Tue, 13 Jan 2004, Jon Noack wrote: >>I am unable to mount CD-ROMs with 5.2-RELEASE. I get the following >>error message: >> >>cd9660: /dev/acd0: Input/output error > > handy. > >>The full dmesg: >>http://www.noacks.org/freebsd/dmesg.20040113.txt >> >>$ grep acd0: dmesg.20040113.txt >>acd0: FAILURE - MODE_SENSE_BIG status=51<READY,DSC,ERROR> >>sensekey=ABORTED COMMAND error=4<ABORTED> >>acd0: FAILURE - MODE_SENSE_BIG status=51<READY,DSC,ERROR> >>sensekey=ABORTED COMMAND error=4<ABORTED> >>acd0: <CREATIVEDVD-ROM DVD2240E 03/18/98/1.8A> DVDROM drive at ata0 as >>master >>acd0: read 16007KB/s (32015KB/s), 2KB buffer, WDMA2 >>acd0: Reads: CDR, CDRW, CDDA, DVDROM, packet >>acd0: Writes: >>acd0: Audio: play, 65280 volume levels >>acd0: Mechanism: ejectable tray, unlocked >>acd0: Medium: CD-ROM 120mm photo disc >>acd0: WARNING - READ_BIG UDMA ICRC error (retrying request) >>acd0: FAILURE - READ_BIG status=51<READY,DSC,ERROR> sensekey=ILLEGAL >>REQUEST error=0 > > The UDMA error is telling -- I think you may have a bad cable. Try > running this command in loader before starting the kernel: > > set hw.ata.atapi_dma=0 > > (or at least check that you aren't setting it to 1 in /boot/loader.conf) > > If that fixes it, then something is corrupting DMA transactions to your > DVD drive. Check the cabling, try rearranging your ATA chains so it isn't > a master device, etc. The same cable worked fine for a 60GB dump/restore on Sunday night (a WD800JB was plugged into it to transfer data to the new hard drives). Regardless, I'll try a different one when I get home. As for the DMA issue, I will quote my original message (yes, I rebooted each time after changing the value in /boot/loader.conf): "Also, toggling "hw.ata.atapi_dma" does not change the behavior." Jon Noack
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