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SubjectRe: [ide-]scsi timeouts while writing cdrom
With what drive chipset is this?

In any event, try doing an 'hdparm -d0 /dev/hdd' and see if that fixes
it. That will turn off DMA on the CD-RW, which is probably causing the
trouble. If not, see if turning off DMA on /all/ the drives fixes it.

I had a problem similar to this on my system, with an AMD-751 ide
controller. To fix it, all I had to do was turn on CONFIG_EXPERIMENTAL
and then "AMD Viper ATA-66 Override (WIP)". After that, the problem
went away.

On Fri, Sep 14, 2001 at 09:36:26PM -0700, Joseph Cheek wrote:
> hello all,
>
> my shiny new cdrw hangs the system when i try to burn a cdrom. i've got a
> a completely IDE system. hda and hdb are hard drives while hdc is a
> standard cdrom and hdd is a cdrw.
>
> while burning cdrecord writes a couple of tracks and then the whole system
> freezes [i need to hard power off]. i can blank cdrw's in the drive just
> fine, however. i'm running 2.4.9-ac10 SMP [on a single-proc system] and
> all partitions are ext3. ide-scsi is loaded as a module at boot.
>
> here's what /var/log/messages shows:
>
> Sep 14 21:12:45 sanfrancisco kernel: scsi : aborting command due to
> timeout : pid 0, scsi0, channel 0, id 1, lun 0 0x00 00 00 00 00 00
> Sep 14 21:12:54 sanfrancisco kernel: Device not ready. Make sure there is
> a disc in the drive.
> Sep 14 21:12:55 sanfrancisco last message repeated 2 times
> Sep 14 21:13:20 sanfrancisco kernel: hdb: timeout waiting for DMA
> Sep 14 21:13:20 sanfrancisco kernel: ide_dmaproc: chipset supported
> ide_dma_timeout func only: 14
> Sep 14 21:13:26 sanfrancisco kernel: scsi : aborting command due to
> timeout : pid 0, scsi0, channel 0, id 1, lun 0 0x43 00 00 00 00 00 00 00
> 0c 00
> Sep 14 21:13:37 sanfrancisco kernel: scsi : aborting command due to
> timeout : pid 0, scsi0, channel 0, id 0, lun 0 0x2a 00 00 00 05 92 00 00
> 1f 00
> Sep 14 21:13:37 sanfrancisco kernel: hdc: timeout waiting for DMA
> Sep 14 21:13:37 sanfrancisco kernel: ide_dmaproc: chipset supported
> ide_dma_timeout func only: 14
> Sep 14 21:13:37 sanfrancisco kernel: hdd: status timeout: status=0xd8 {
> Busy }
> Sep 14 21:13:37 sanfrancisco kernel: hdd: DMA disabled
> Sep 14 21:13:37 sanfrancisco kernel: hdd: drive not ready for command
> Sep 14 21:13:41 sanfrancisco kernel: hdd: ATAPI reset complete
> Sep 14 21:13:41 sanfrancisco kernel: hdd: irq timeout: status=0xd0 { Busy
> }
> Sep 14 21:13:42 sanfrancisco kernel: hdd: ATAPI reset complete
> Sep 14 21:13:42 sanfrancisco kernel: hdd: irq timeout: status=0x80 { Busy
> }
> Sep 14 21:13:42 sanfrancisco kernel: scsi0 channel 0 : resetting for
> second half of retries.
> Sep 14 21:13:42 sanfrancisco kernel: SCSI bus is being reset for host 0
> channel 0.
>
> any guesses?
>
> thanks!
>
> joe
>
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-Steven
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