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Re: How to enable DMA on a SATA drive (was dd backup unbelievably slow on SATA laptop)



On 1/4/07, Matt Davey <mcdavey mrao cam ac uk> wrote:
On Thu, 2007-01-04 at 10:09 -0700, Kevin Kempter wrote:
> On Thursday 04 January 2007 09:23, Lonni J Friedman wrote:
> > On 1/4/07, Kevin Kempter <kevin kevinkempterllc com> wrote:
> >
> > > I find that my avg speed in 1.7m/sec which leads to a full backup time of
> > > around 16-17 hours.
> > >
[...]
> >
> > It sounds like DMA is disabled.
> >
[...]
> All;
>
> How can I enable DMA on a SATA drive in a laptop?

hdparm -d1 <device>

I've yet to run across any SATA controllers which allow one to enable
or disable DMA support via hdparm.

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
L. Friedman                                    netllama gmail com
LlamaLand                       http://netllama.linux-sxs.org


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