How do I turn on DMA for ide-scsi DVD drives

[spmirowski]

Alan Cox wrote:
> On Wed, 30 Jan 2008 19:37:36 -0800
> spmirowski <spmirowski at shaw.ca> wrote:
>
>   
>> Hello,
>>
>> Back when Fedora handled disc drives as ide, I would use hdparm to turn 
>> on DMA.  Now that Fedora 8 seems to run them as SCSI devices, hdparm 
>> can't tell them to turn on DMA.  Any ideas how to get them blazing fast 
>> again?
>>     
>
> Its always done automatically by libata.
>
> Alan
>
>   
Thanks,

It would appear the issue wasn't DMA, but nvidia-config omitted 
something from my xorg.conf that allows hardware acceleration for XVideo.

Stephen