But then ReVaN, is not it that you never know for sure with hard disks, there are so many other factors that count. One a lot of people don't count is DUST, yes normal household dust. It can ruin computers, it can ruin hardware, it can even ruin complete motherboards (I had one burnt because of over excessive dust, cost me 400 euros). You have to dust out your computer housing every year. Do this, some install a little extra fan, running with an USB cable on a second USB port. A hard disk can be like any other piece of hardware. You can be lucky and it runs, and runs, others fail just being out of service time.
There are two more dangers people are not aware off, bump against the housing while the harddisk is doing a spin (dangerous), and off course fluctuations in the current. This can cause more errors than software bugs. That is my comment,
polonus