I’m doing a straight drag and drop using UNC paths with  a single 1.5gig zip file and a 2.2Gig binary File.  If I add more streams (aka start more than one copy on more than one server the filer happily provides more bandwidth)

 

From Windows server to windows server I get 500 Mbps

From Windows server to a Netapp 6030 Filer running DOT 7.2.1 I get about 250 Mbps

 

I’ve tried TCP windows size, Flow Control, LCAP, Static Link Aggregation, Singe port on the filer (no vif), straight crossover cable.