megacli has been superseded by storcli .. below is a quick and dirty method of monitoring your megaraid.. drop into /etc/cron.d/hourly for instance and be sure to have a mail server running and update with your email address.

gistfile1.txt

#!/bin/bash

storcli64 /c0 show events type=sincereboot filter=warning,critical,fatal > /etc/storcli/status.tmp
if ! diff -q /etc/storcli/status /etc/storcli/status.tmp > /dev/null ; then
  cat /etc/storcli/status.tmp | mail -s "RAID Problem on hostname!" user@example.com,anotheruser@example.com
  mv /etc/storcli/status.tmp /etc/storcli/status
fi