Hello,
The 11020 event is usualy releated to the 2003 agents and i've modified the MIB in SIM to supress this event. It tells you nothing. If i look at the screen you send it seems you are missing the ILO and memory info. Perhaps if you drill down to system you find memory info. You could if you dare pull a disk drom your server only if the Disk is a mirror set.
But who goes seeking for trouble ?