Straight off the website:
"What is S.M.A.R.T. technology for hard drives?
S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is implemented into all of the modern hard disks. A special program inside the disk constantly keeps tracking the condition of a range of the vital parameters: driver, disk heads, surface state, electronics, etc. At the present time, S.M.A.R.T. technology is able to predict up to 70% of all hard disk problems! However, to use this information, you firstly have to retrieve it from the disk and analyze it. This is one of the Active SMART program's tasks."
The bottom line is, if you have a newer hard drive, you have SMART. You can use ActiveSmart, which is what I linked to above, or some other program to use it.