Event Monitoring Service (EMS) notifies a system administrator when an event occurs on the system.
A hardware event monitor monitors the hardware for unusual behavior (known as an event) and sends a message to EMS, which notifies the system administrator and provides suggestions for correcting the problem.
There is a disk monitor that will monitor all disks attached to the A7173A adapter.
For more information about EMS and other online diagnostic tools, see the documents at:
http://docs.hp.com/en/diag.html#2%20Online%20Diagnostics