Here you can see information about the health status of the selected hard drive. 

Precision
The "precision" bar shows you the pricision of the "Nearest T.E.C." date prediction. This precision depend on the monitoring time, attributes changes frequency and attributes values.
 

Known problems
This field shows a problems with selected hard drive. It can be a high temperature value, problems with IDE cable, problems with drive mechanics.
 

Overall health status
This field shows a current overall health status for selected hard drive.
 

Nearest T.E.C.
This field shows a nearest T.E.C. date for selected hard drive.