Well, hard drives give you signs that they are failing, for instance, does the drive make more noise than normal? Is the clicking getting louder? Does it seem to be clicking more than usual? You can also tell if you are getting a lot of errors or the pc freezes a lot.
Can you explain more about what makes you suspicious of your hard drive?
When all else fails...Ham Radio!
I still have the same old HP DV9700T laptop I've had for years...still kickin'