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

[Alan Cox]

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