nForce4-SLI, AHCI and NCQ and FreeBSD 6.0

Malachi de Ælfweald malachid at
Tue Sep 6 07:09:02 PDT 2005

I have noticed the same thing with the onboard Silicon Image controller. I 
am using the A8N-SLI Premium. I am using the Silicon Image controller 
instead of the nForce4 controller because it specifically said SATAII and 
said it supported RAID5 (whereas the nForce did not support RAID5). However, 
on boot it recognizes it as SATA150 (which should be SATA300).


On 9/6/05, O. Hartmann <ohartman at> wrote:
> Hello.
> I have a little question about the popular nForce4-SLI chipset for the
> Socket 939 platform. The onboard SATA controller of the nForce4-SLI
> chipset claims to be NCQ (or SATA II) capable, but nVidia implemented
> this feature in a not-AHCI-standardised way, but as an own solution. My
> question is: Is the FBSD 6.X driver for the nForce4-SLI chipset capable
> of using NCQ (as I know, the driver has to enable NCQ and it's not done
> automatically by the harddrive-controller interaction).
> Thanks in advance,
> Oliver
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