50% Throughput on direct connect XCOPY transfer

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http://serverfault.com – I have two Dell Servers with multiple gigabit network ports each. These run a sync process using XCOPY. To improve throughput and reduce overall network impact, I have dedicated a connection on each machine to this purpose by directly connecting the machines with a cat 6 crossover cable and setting static IP addresses that are completely off the standard network. The transfer is mainly a one-way process. The source machine is a VM with a separate virtual adapter configured to directly use the specific adapter on the host. I am seeing only 50-60% network utilization of the adapters on the (HowTos)