[ale] Playing DVD on higher kernel?

[Matty]

Thanks for the post. Enabling DMA on my CDROM and
Hard drives makes a significant difference. I grabbed
some stats with and w/o DMA enabled. 

Thanks!
Ryan

[Exhibit A]

[matty at pooh matty]$ cat dma_tests
Without DMA

[root at pooh dev]# time dd if=/dev/hda1 of=/dev/null bs=512
4096512+0 records in
4096512+0 records out

real    7m45.026s
user    0m2.613s
sys     2m33.109s

With DMA

[root at pooh matty]# time dd if=/dev/hda1 of=/dev/null bs=512
4096512+0 records in
4096512+0 records out

real    0m56.104s
user    0m2.611s
sys     0m11.039s

On Wed, 2002-11-27 at 10:38, Gregory McLean wrote:
> On Wed, 2002-11-27 at 08:25, Fulton Green wrote:
> > Actually, Red Hat disables DMA for most disk devices. Stick the following
> > in your RH 8.x modules.conf reboot to get around this:
> > 
> > options ide-cd dma=1
> 
> Or if you would rather not act like you're still using windows:
> 
> edit the file, then as root hdparm -d 1 /dev/<cdrom dev>
> 
> And be happy.
> 
> Greg
> 
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> Ale at ale.org
> http://www.ale.org/mailman/listinfo/ale


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