There are three different Mindstorms kits and on top of this there is a plethora of tools for programming, different versions of NXT firmware and NXT software.
ESXi vmkping usage: https://kb.vmware.com/selfservice/microsites/search.do? language=en_US&cmd=display KC&external Id=1003728 This is a big discovery because packet fragmentation will not only degrade performance, but flood the links with lots of packet fragmentation.
I went ahead and re-configured my ESXi hosts to use an MTU of 8900 on the network used with my SAN.
This immediately created a MASSIVE performance increase (both speed, and IOPS).
I highly recommend that users of the MSA 2040 SAN confirm this on their own, and update the MTUs as they see fit. Ideally, on a single network, you want all devices to be running the same MTU.
I was under the assumption that the unit supported 9000 MTU, while reserving 100 bytes for overhead. Nicolas chimed in and provided details on his tests which confirmed the HPe MSA 2040 does actually have a working MTU of 8900.In my configuration I did the tests (that Nicolas outlined), and confirmed that the MTU would cause packet fragmentation if the MTU was greater than 8900.