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

Alan Cox alan at
Mon Feb 4 12:19:34 UTC 2008

On Wed, 30 Jan 2008 19:37:36 -0800
spmirowski <spmirowski at> 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.


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