To enable the S.M.A.R.T. function please perform the following.
Go to the console screen then enter ctrl. + alt. + w (this is the Hardware Configuration menu) then select Functionality options and hit the SPACE bar to select the S.M.A.R.T.
Note:
The build-in S.M.A.R.T. does not work with Hardware RAID controllers, this only works with pure ATA / SATA controllers.
To have S.M.A.R.T. work with RAID controller please enable this on the RAID controller.