I was told when I purchased my first Dell server that Dell are capable of being monitored by HP SIM software.   I contacted HP and made sure I am loading the Server MIBs correctly.   I have OM 5.4 installed on my Dell Server.   Still no hardware failures are reporting.    We had an incident where we had to replace a hard drive in one server, it should have alerted us that one drive on the mirror was in a failed state.

Thanks in advanced