So it seems the Dell EMC OpenManage Plug-in Version 3.1 for Nagios Core has limited functionality and will only display the 3 stats.  Not very informative.   So it seems that we cannot monitor any real performance stats needed on the MD.    
MD3600i- dual ISCSI Controllers- dual Power suppliesFW: 08.20.24.60 Setup a Nagios Core server - workingInstalled 'Dell EMC OpenManage Plug-in Version 3.1 for Nagios Core' - workingran the Device Discovery for the MD Only have 3 servicesDell EMC Storage MD-Series InformationOK 06-07-2023 16:27:54 0d 18h 54m 44s 1/10 #1 Overall Storage Array = OK, ProductID = MD36xxi, World-wide ID = 6c81f66000c45fc60000000053ed7bd3, Storage Name = kye-san01Dell EMC Storage MD-Series Overall Health StatusOK 06-08-2023 09:43:22 0d 18h 54m 17s 1/10 Overall Storage Array = OKDell EMC Storage MD-Series TrapsOK 06-07-2023 14:37:05 0d 2h 17m 44s+ 1/1 PING OK - Packet loss = 0%, RTA = 0.35 ms Docs do not say which services I should see Was hoping for more services monitored, simular to the performance info on MDSMwould like to see iscsi nic performance stats, disk & virtual disk stats, caching stats, etc. Can the OpenManage Plug-in for Nagios Core provide more monitoring & stats?  
OpenManage Plug-in for Nagios Core - need performance stats