Anil Gopinath wrote:
> Check if your board also has an ADT chip along with
> the windbound chip. The last time I checked NetBSD did
> not support the ADT chip and fans controlled/monitored
> by this chip would not show up in envstat.
> 
> I have written a driver for the ADT7463 chip and
> plumbed the sensor measurement to envstat. If there is
> some interest I could check and see if the code can be
> made open-source.
> 
> Anil

This is the only documentation I can find:

http://www.supermicro.com/manuals/motherboard/A_8131/MNL-H8DA8.pdf

and it doesn't seem to list any chip details for monitoring.