Verify duplex settings. A long time ago I had an HP server and a Cisco switch with both sides having auto-detecting speed and duplex. Weird things happened when transferring large quantities of data because the NIC thought the connection was full duplex and the switch thought it was half. Forcing both sides to full duplex resolved the issue.
-Jeff From: Christopher Bodnar [mailto:[email protected]] Sent: Tuesday, February 26, 2013 10:43 AM To: NT System Admin Issues Subject: Re: Communications slow between two servers I'm not familiar with Smart Sync, so can't comment on that. But can you reproduce the problem outside of that software? For example do you see the same slowness if you use RoboCopy or DFSR? Take a look at this post: http://social.technet.microsoft.com/Forums/en-US/winserverfiles/thread/e55022a4-db65-4dc9-a2f1-96b7f5d8e2fa Even though you aren't using DFSR, it might give you some ideas. Specifically I'd look at the TCP off-load value . That might help. Christopher Bodnar Enterprise Architect I, Corporate Office of Technology:Enterprise Architecture and Engineering Services Tel 610-807-6459 3900 Burgess Place, Bethlehem, PA 18017 [email protected]<mailto:> [cid:[email protected]] The Guardian Life Insurance Company of America www.guardianlife.com<http://www.guardianlife.com/> From: Eric Brouwer <[email protected]> To: "NT System Admin Issues" <[email protected]> Date: 02/26/2013 10:18 AM Subject: Communications slow between two servers ________________________________ Greetings, I have an odd communications issue that I just can't pin down. I have two existing servers, X and Y. X will be replaced by a new server, Z. Then Y will be replaced by X, and Y decommissioned. These are rather simple file servers. When we brought Z online, we copied data from X to Z via Smart Sync and got fantastic transfer speeds. When we went to copy from Y to X, however, speeds are horrible. What should take several hours is taking days. We then tested communications between Y and Z and speeds are great again. All servers are on the same switch and reside in the same rack. Why would 2 servers communicate so slowly? X to Z = fast Y to X = slow Y to Z = Fast Results are the same whether we "push" or "pull" data. Thank you, Eric ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected]<mailto:[email protected]> with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected]<mailto:[email protected]> with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
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