Could you post a screenjob/info of the job actions gui? things like:
- which proxy is being used (is this the right machine? It should be the one with the "best" connections to source and destination)
- which transport method is being used? like [NDB] or [SAN Direct]
- is CBT being used? (you should be able to read this next to the disk read speeds)
- Bottleneck stats: It will say Busy: Source,Proxy, Network, Target. How are these values?
Probably a shot in the dark, but could it be you have tried to configure jumbo frames? Not doing this everywhere can lead to very strange results / performance