[ltp] T40: DMA Mode

Heiko Rosemann linux-thinkpad@linux-thinkpad.org
Fri, 7 Nov 2003 17:30:11 +0100 (CET)

On Fri, 7 Nov 2003, Thomas de Grenier de Latour wrote:

> On Fri, 7 Nov 2003 16:34:02 +0100
> markus@nospers.de wrote:
> > Hi,
> >
> > i've the Problem, that it seems that I can't enable the dma mode of
> > the harddrive of my T40.
>  ...
> >         DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
> Wait, doesn't this means you do have DMA enabled?
I almost wanted to send in that comment, too, but - tried it out on my X30
with 40G disk, and even if I explicitly deactivate DMA (and have the read
speed drop from 20MB/s to 4MB/s) hdparm -i and hdparm -I both report the dma
line as above, which I definitly would interpret as "running UDMA5"

YMMV, Heiko