Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a Windows Server 2008 Domain Controller that I run as a do-it-all server. It has a GbE connection to the network and to every machine on the network.

Downloads from the server file shares work as expected, between 70MB/s and 80MB/s to all the machines. However, when I try to copy files back up to the server, speeds fall to 7MB/s-10MB/s. I've disabled flow control and large send offload properties on all the NICs.

I had this problem before and managed to fix it through some properties changes, but like an idiot, I never documented my fix and have since moved to a new server.

Any ideas what I need to do to get the speeds to be more symmetric?

EDIT: Remote differential compression is also disabled.

share|improve this question

Sounds like you may have a duplex mismatch, aka server is negotiating at 1GB but switch is negotiating at say 100Mbit.

Worth a check on the advanced settings of the network card.

Worth a look:

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.