Whenever I try to move files between servers through a Windows File
Copy I can never get more than 25% NIC utilization on a Gigabit NIC.
Here are all of the things I've tried to diagnose the problem.
I made sure that name resolution was working properly (both DNS and
WINS). I've tried performing the copy with both the netbios name as
well as the IP address directly.
I've verified the NICs have the most recent driver from the
manufacturers. In this case HP, these are Proliant DLXXX series with
the NC 77XX series gigabit NICs installed. I have verified the card's
link speed and duplex settings match how the switch port is configured
(auto if the switch port is auto, and hard coded if it's beens
specifically configured to something else).
I've tried different network cables, different grades of network
cables (CAT 5e vs CAT 6), and different switch ports. I've even tried
a direct connection between servers with a cross over cable. In the
direct connect scenario I let the cards autonegotiate to 1Gbps full
duplex.
The switch that all the servers are connected to is a Cisco 6509,
with low CPU utilization. That doesn't seem to be the bottleneck.
No matter what I try, I can't break the 25% utilization barrier.
Does anyone have any recommendations for me. Some random thoughts I
have x64 Enterprise Edition R2 servers talking to x86 Standard Edition
servers without the R2 feature set. Is it possible there is something
in R2 that's causing this limitation. I've looked through the various
event logs (system and application) and there just doesn't seem to be
any clues.
I would appreciate any advice you have to offer. Thanks in advance
for your help
Drew Flint
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