How to enable DMA on a SATA drive (was dd backup unbelievably slow on SATA laptop)
Matt Davey
mcdavey at mrao.cam.ac.uk
Thu Jan 4 17:16:25 UTC 2007
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 at 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'd advise you take a look in the logs for any reported hard disk
errors. Last time I had a disk that was getting DMA turned off, I found
it was because of end-of-life related errors. May be time to replace
your disk.
Matt
Matt Davey I stopped believing in Santa Claus when I was six.
mcdavey at mrao.cam.ac.uk Mother took me to see him in a department store and
he asked for my autograph. -- Shirley Temple Black
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