Enable cd/dvd DMA

[Kam Leo]

On 7/10/05, Scot L. Harris <webid at cfl.rr.com> wrote:
> 
> On Sun, 2005-07-10 at 21:25, Stephen Armstrong wrote:
> > I'm trying to enable DMA (for hdc) using hdparm as
> > root but when I tried hdparm -d1 /dev/hdc I get the
> > error: hdparm -d1 /dev/hdc not permitted
> 
> Check the bios options for the mode your cd/dvd player is set for.
> 
> I have a mother board that this had to be set correctly to allow hdparm
> to set the DMA mode.
> 
> --
> Scot L. Harris
> webid at cfl.rr.com
> 

Not all CD/CD-RW drives support DMA.  I have 4X and 12X CD-RW drives
which only supports PIO.