Smart Drive Error Message on Boot Up
S.M.A.R.T. [Self-Monitoring Analysis and Reporting Technology]
There is a built in monitoring device on hard drives that monitor the integrity of the hard drive. If it detects that the hard drive is failing, it will give you a message on boot up of the possible failure. It will be a good idea to back up any of your personal files that you don't want to loose and replace the hard drive. This is an indication that the drive is starting to fail.
The following is a list of well known third party companies that have the capability of restoring lost files if you can't get access to your files.