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

[Matt Davey <mcdavey mrao cam ac uk>]

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'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 mrao cam ac uk 	Mother took me to see him in a department store and
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