Thanks for posting!  OpenManage Server Administrator should go on the servers you are trying to monitor.  After that, I think you need to put the management pack on the system with SCOM.  That should let SCOM talk to OMSA and monitor the hardware.  I don't know about the management pack, but the OMSA install won't need a reboot.
Hi, I have a DELL PowerEdge 2970 server running Windows Server 2008 x64. I would like to have some kind of monitoring of the RAID array (mirrored disks). On another server we have Microsoft System Center Operations Manager, and I've seen a Management Pack from Dell around. My question is: where do I install the Management Pack; on the PowerEdge server or on the SCOM server? Is it enough to install the management pack, or do I need any additional software on the PowerEdge server? Where do OpenManage fit into all of this? Secondary question is: do I need to reboot the server during any of these installs? Thanks in advance!
DELL OpenManage, DELL Management Pack and System Center Operations Manager... 
confused!