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

Alan alan at lxorguk.ukuu.org.uk
Thu Jan 4 17:52:14 UTC 2007


> > hdparm -d1 <device>
> 
> I've yet to run across any SATA controllers which allow one to enable
> or disable DMA support via hdparm.

The SATA drivers always enable DMA when possible.  A dmesg is really
needed to see what is going on.




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