> We are hyper-threaded with 8 effective processor, does that make a 
> difference?  (We found the same thing in Google).

My little experience with HT shows poor performance I/O-wise (worse than
linear scaling, of course, since there was contention -- but this is on
one-year old hardware now), so I would _suspect_ that HT would not help
w.r.t. nfsd count.

> We are having some packet receive errors but nobody can tell us why.
> If there are other ideas on how to tell whether the network card
> is saturated, let me know.

Hopefully others who are more knowledgeable can chime in with better
information in this area...

> No, no jumbo frames.. NFS howto says with TCP this size is OK.

Yeah, sorry, brain fart there. :) Future Googlers: [fake spooky voice] ignore
the suggestion to check MTU size [/voice]

Dan W.