hdparm & DMA

Kevin Jordan kmj7777 at gmail.com
Fri Aug 19 00:48:27 PDT 2005

On 8/18/05, Steven Pasternak <stevenp500 at bellsouth.net> wrote:
> Hi! I am trying to get dma to work with hdparm (system is VERY slow
> without it), but when I
> do 'hdparm -d1 /dev/hda' I get this:
> /dev/hda:
>  settings using_dma to 1 (on)
>  HDIO_SET_DMA failed: Operation not permitted
>  using_dma   =   0 (off)
> I am building blfs on top of an LFS 6.0 System. On SuSE dma works fine.
> How do I fix this?
> Thanks!
> -Steven
> --
> http://linuxfromscratch.org/mailman/listinfo/blfs-support
> FAQ: http://www.linuxfromscratch.org/blfs/faq.html
> Unsubscribe: See the above information page
What are you running hdparm as?  You need to be root to run it.  A
more permanent (and better) solution would be to compile in support in
the kernel for your motherboard chipset and DMA will be automatically
enabled without the need to go through hdparm.

Kevin Jordan

More information about the blfs-support mailing list