Error message at startup !! I got this error message when I startup my

Question

I got this error message when I startup my laptop------------------SMART Failure Predicted on Hard Disk 0: TOSHIBA MK6025GAS-(PM)WARNING: Immediately back-up your data and replaceyour hard disk drive. A failure may be imminentPress F1 to Contiune------------------The question is do I really need to replace another Hard disk since it still working fine or are there any way that I can fix this problem? And what causes this problem?Thanks !