Dell PE & HP Monitoring

Hi all.
I have a couple of Dell PE and HP ProLiant servers to monitor.
They all have theyr managing application installed so they send SNMP traps correctly.

I can connect and monito via SNMP CPU, MEM adn HD space.

Do I will receive alerts when a Drive in RAID will fail?
I have downloaded from Dell all the last MIBs. How can I use them?

Sorry, but I'm new with this tool.
Regards