S.M.A.R.T. (Self Monitoring And Reporting Technology) is a protocol which
modern hard drives utilize to report their status to the host machine. The hard
drives monitors itself for any kind of emerging defects and reports the problem
for you to take the corrective action. Proper corrective action typically involves
backing up all the data on the drive before returning it under warranty.
Active SMART (www.ariolic.com/activesmart/index.html)