Monitoring Hard Disks with SMART

In my PC, Chasis fan and CPU fan used to run at 2500rpm and 2900rpm respectively and it was noisy; then I enabled Fan-Q-control in BIOS and CPU fan came down to 950rpm and consequently machine became silent. I have set to Q-Control is OPTIMUM. According to ASUS tool CPU & SYSTEM temparatures are 12C and 30C respectively; but HDDs are hot and I sensed it physically and this is not scientific way to measure.

I came across an article on standard that HDD manufacturer's compy to and according to that standard HDD is supposed to provide info on it's health...

http://www.linuxjournal.com/article/6983