Hi
when you say "same/similar hardware and software" are you saying that the servers are running with the same Microsoft Hotfixies?
Please be sure that the server is fully patched. Even though this https://mysupport.netapp.com/NOW/cgi-bin/bol?Type=Detail&Display=1105054 refers to Windows 2012 worth a try to check.
Then, SnapDrive uses WMI to query details about the initiators in the machine. In some cases, this WMI data can be lost or corrupted. A reboot can clean-up this situation.
Another check you can do is on the MPIO settings/configuration.
If that won't help please retry the disk enumeration in SD and then check what is reported in the snapdrive logs you can find in the snapdrive installation folder
hope this help