Folks, I just posted this new thread related. Thx Rob  [URL] 
I have two DRAC devices added to OME. OME is pulling all of the system information, it shows everything about the host, and shows them as Inventoried. However, when I go to the System Update tab, it still lists the two devices under the Non-Inventoried Systems tab. I have two other DRAC devices that are in the same group and inventory fine. I am not sure why.
DRAC Devices Are Not Inventoried