Hard disks have finite lives – some perform well over their rated life-span and some die before time. CrystalDiskInfo analyses your hard disk and gives an overall health status based on multiple parameters. Checking the parameters gives you an early warning of the status of your hard disk instantly. The status, if blue, means there’s nothing to worry, if yellow, there is an element of caution and if it shows red, you need to replace your hard disk! It’s a good idea to periodically check the health of your hard disk, so that you do not have a disaster when the hard disk actually fails.