Well, the first question I always ask - are the ports locked at speed/duplex on both the server NICs and the switch ports?
Regards, Michael B. Smith MCSE/Exchange MVP http://TheEssentialExchange.com -----Original Message----- From: Micheal Espinola Jr [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 20, 2008 12:27 PM To: NT System Admin Issues Subject: [Robo]copy performance issue Hi everyone, I"m seeing something peculiar with robocopy, and quite the opposite of anything I have seen before or would expect. I am performing a simple robocopy mirror copy between two servers. When these servers were attached to different uplinked switches, copy time/performance was as expected. I recently moved one of the servers so that it is connected to the same switch, and apparently all copy-related performance has become abismal - with network utilization staying below 1% ! Previously, when connected to an up-linked switch, the utilization would peak close to 50% during a large file copy. This happens with robocopy as well as an Windows GUI copy. The switches involved are Cisco 3560's. Both servers are currently attached to the same, while with the prior placement one of the servers was attached to a different 3560 that is up-linked via SFP. I'm currently at a loss as to why this is occuring. Any suggestions/ideas? TIA! -- ME2 ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~ ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~
