[CentOS] smartd and 3ware 9xxx configs

I'm looking to do a bit more monitoring of my 3ware 9550 with smartd,
and wanted to see what others were doing with smart for monitoring
3ware hardware.

Do you have the smartd.conf configured to test, or simply monitor health status?
Are you monitoring the drive as centos sees it (/dev/sdX) or are you
using the 3ware /dev/twaX for monitoring?

Opinions and discussions are welcome :-P

-- 
During times of universal deceit, telling the truth becomes a revolutionary act.
George Orwell