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In Pictures: Windows Server 8 - Ten features manag...
Offloaded Data Transfer
If you are moving data from one SAN drive to another SAN drive across the network, you have no need to pass that data through the server. Windows Server 8 uses Offloaded Data Transfer to remove the server as the middleman, allowing the data to transfer with minimal impact to server resources or bandwidth.
In Pictures: Windows Server 8 - Ten features managers will love