On Thu, 12 Jan 2006 22:35:21 +0100, Ondrej Zary wrote:
> Hello,
> I found this problem when burning DVDs using K3b (it uses growisofs to
> do the work) with LG GSA-4167B drive:
> Burn process completes without any problems, then K3b ejects and reloads
> the tray, then it calculates MD5 checksum from the image. Then it starts
> reading the DVD back to calculate MD5 checksum of it. The moment it
> starts to read, this appears in dmesg:
>
> hdd: irq timeout: status=0xd0 { Busy }
> ide: failed opcode was: unknown
> hdd: DMA disabled
> hdd: ATAPI reset complete
>
> And then it slowly reads the DVD in PIO mode. After about a hour, it
> finishes with success. When I re-enable DMA mode ("hdparm -d1 /dev/hdd")
> immediately after it was disabled, it works fine in - there are no more
> errors in the log and the verification completes much sooner. I burnt 10
> DVDs and it always does exactly this.
>
> Any ideas why it does this? And why ide-cd disables the DMA?
I think the drive just takes too long to recongize the disc. My 4163B has
the same problem which is why I always close the tray manually or with
eject -t and wait a while before mounting or burning the disc. Of course
that won't help in your case. I guess the real fix would be to
increase some ide-cd timeout.
--
Ville Syrjälä
[email protected]
http://www.sci.fi/~syrjala/
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