lkml.org 
[lkml]   [2006]   [Jan]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: ide-cd turning off DMA when verifying DVD-R
Date
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
syrjala@sci.fi
http://www.sci.fi/~syrjala/


-
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/

\
 
 \ /
  Last update: 2006-01-13 05:05    [W:0.063 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site