Thanks for posting!  Your ITA is a little old, I think 8.5 is the latest version, so you might want to update it.  Your tests indicate that the MD3000 is not communicating via SNMP.  You should go into the configuration utility for it and set the SNMP community string (which is case sensitive), and the destination IP address.  Most likely that will fix the problem.  I'm pretty sure the MD3000 includes an SNMP agent, but bear in mind that some devices don't have one, so they can only show up as Unknown in IT Assistant.
Hello all, We've recently added an MD3000 to one of our Poweredge 2950 servers.  Array works great, no issues there.  However, our IT Assistant server won't classify the unit as a Powervault device, instead it's in the Unknown category.  Using the Troubleshooing Tool, the MD3000: ITA is v8.2, and the array contollers' firmware is at 07.35.22.61 - the latest.  MD Storage Management Client software is installed on the ITA box, and sees the array just fine.  There are no firewalls in between the ITA box and the array, and I've disabled Symantec Endpoint Protection on the ITA box.   Any ideas?  Thanks in advance.
IT Assistant won't see Powervault MD3000