I recently found that on one of our busiest SCOM deployments, that certain Dell servers had not been discovered by the Dell Server Management Pack.
The primary requirement for the Management Pack to operate, is to have Dell Open Manage Server Administrator 6.2 or higher installed when using the most recent Dell Server Management Pack (Version 5.1).
For us, this was a recently installed Windows 2012 server which had a disk that was in a predictive failure state. As the server had not been discovered we missed this alert, luckily it was just a predictive failure not a failed disk / RAID array!
So to fix the issue plenty of troubleshooting was done! In our case the following helped address the issue!
I had noticed that the list of management packs the non discovered server had in
"C:\Program Files\System Center Operations Manager\Agent\Health Service State\Management Packs"
differed from a server that was discovered, so it was then obvious a discovery had failed to obtain the remainder of the required management packs.
Within authoring, i set the scope to the Dell management packs, and selected object discoveries.
Locate the following discovery -
Create an override for all objects of the class: Windows Computer
Changing the interval to something less that a day! Additionally set the Log Level to 1.
This will create a file called "Discover_DellServer.log" in the folder "c:\Windows\Temp"
When reading the contents of the log, a rather obvious error was on show!
"ERROR: UnManaged Server object created. Reason: Failure error while connecting to root-cimv2-Dell namespace."
After some searching through various posts, this post led me to the fix.
Even though it was based on an older version of omsa, the folder structure and file name is now native 64 bit. So within the path "C:\Program Files\Dell\SysMgt\omsa\config", is a file called "dccim64.mof".
Add "#pragma autorecover" in the first line of the file, and then run
mofcomp dccim64.mof from a command prompt to import the new data.
Restart the System Center Management Service on the server in question and let the discovery occur.
For me the log didn't have the issue as before. The additional management packs were then downloaded to the server. The server didn't appear in the "Dell Unmanaged Servers" group anymore, but did appear in the In-band server view of the console as expected!!