Now that my curiosity is aroused to dangerous levels, i felt the need to share with you out there, CAN WE PREDICT A FAILING HD? I G-D around and came across this nice article :
How to Tell When Your Hard Drive is Going to Fail
WHY DO HDs FAIL?
1) Logical Failures
2) Media Failures
3) Head Failures
4) Mechanical Failures
It's not always that we get to hear or identify HD "failing" symptoms. Below are a few!
A) Strange Noises
B) Disappearing Data and Disk Errors
C) Your computer stops recognizing your drive
D) Computer Crashes
E) Really Slow Access Times
" Sound is a great indicator. As soon as the sound changes from the norm, or you get plenty of clicking and grinding from your hard drive, you need to power it down immediately. Get to know the sound of your hard drive while it’s young and in working order, because you’ll need to be able to hear the slightest differences when it gets older."
All the headings and prose are the copyright of the above mentioned link! I sincerely request you to read the article in it's entirety"! I will take leave with a comforting sentence"HARD DRIVES ARE INCREDIBLY SENSITIVE BITS OF HARDWARE"!

REGARDS,
Sreedhav.