I recently shut down a Drobo 5N through Dashboard so I could plug it into a UPS.
When I booted up the 5N, the IP address had changed so I had to remap the 5N to a drive letter. I have had problems with this in the past when doing it through the dashboard so I have been mapping through windows without any problems until now.
Now when I attempt to map my 5N to drive A I get the following windows error: “Network Error. Windows can not access \192.168.1.9\Public. Check the spelling of the name. Otherwise they may be a problem with your network.”.
Attempting to map the drive in Dashboard results in Dashboard saying the drive is "Connected"but nothing shows up in Explorer/Windows.
I am able to ping 192.168.1.9.
OS: Win7 64 bit
Dashboard: 2.7.1 
Drobo: 5N (3 6TB WD black), firmware 3.5.6 [8.84.79430]