No HDD-DMA with nForce 410 MCP (on Linux)

[zabex]

I could not enable HDD-DMA on my new AsRock K8NF4G-SATA2.
hdparm -d1 /dev/hda
generates a
HDIO_SET_DMA failed:Operation not permitted
I tried Knoppix and compiled several Kernel (2.4, 2.6) with different options - no success
(yes, I enabled the IDE, nVidia Chipset support)

Could it be that the new nForce 410 is not compatible with current the Linux nVidia IDE support? Or do I just make a mistake?

Any help really welcome!

[tabanus]

What distro are you using? DMA works fine for me in Gentoo, using kernel 2.6.13.

I don't have any SATA drives, and found that I had to disable SATA in BIOS to get things working though.

[zabex]

Problem solved:
I was using Debian Kernel 2.6.8 which ist the highest kernel number you get when looking for "kernel-source" with apt-cache.
Now I found that I have to use "linux-source" instead.
So with "apt-get install linux-source-2.6.12" I've got a kernel that supports the DMA on my board!
So I was able to build my HDD-copy-machine. You may have a look at it on
http://www.dietmar-schroeder.de/hddcopy.html
(German text only)