I have a desktop computer with two SSD's in RAID 0 with a read/write speed of 950 MB/sec (7.6 Gbps) and I have a server with 6 HDD's in RAID 5 (read/write speeds of 200 MB/sec or 1.6 Gbps) acting as a file server. Currently, both my server and my desktop are plugged into a Gigabit switch which is plugged into a Gigabit Cisco Router. I am using all CAT 6 cable for everything, my server and my desktop have Gigabit Ethernet cards in them, and nothing is happening on the server or on the desktop. When I try to copy a large file from my desktop to my server I reach a bottleneck of about 54 MB/sec (432 Mbps). What could possibly be the bottleneck that would be slowing this down? Both NIC's are not even 50% utilized.
Server OS: Windows Server 2008 R2 Standard Desktop OS: Windows 7 Ultimate