[ILUG] hdparm ide brutal performance - ubuntu

[Michael Conry]

On Apr 7, 2005 10:09 AM, Conor Wynne <weeboy at conorwynne.com> wrote:
> root at charzard:~ # hdparm -c3 -d1 -m16 -k1 /dev/hda
> 
> /dev/hda:
>  setting 32-bit IO_support flag to 3
>  setting multcount to 16
>  setting using_dma to 1 (on)
>  HDIO_SET_DMA failed: Operation not permitted
Could you have DMA disabled in the kernel?
Or have DMA disabled, but not have enabled a specific driver for your
chipset (I haven't run into this problem, so no idea if such a
misconfiguration would actually manifest itself like this)

Michael