We have two main datacenters, one in North Dakota where we have an H400 cluster, and we have an H500 cluster in our corporate location in Kansas. Our H400 performs flawless and reliably, while our H500 is struggling and has wild transfer rates on LAN transfers. We get 4-600MB/sec consistently in our H400 location, while in our H500 it's wildly intermittent. Transfers appear to happen in a sawtooth pattern where the xfer rates are up and down constantly during a transfer.

Here's what we know:

-Switch gear is exactly the same in both locations. 

-We have performance issues within the Data Center where the servers/pcs are using the same switch as the Isilon... so minimal hops.

-We have the latest patch(es) on the H500 hardware to see if that was the issue.

- Machine to machine transfer on that same switch that the H500 uses are stellar. So we know the switches are working.

Help! Support has been severely lacking and we have people who are having a hard time getting work done...