Well, for example, a virus can seek all the time when
the hard is idle, which significantly shortens its life...

other, more sophisticated way is to dupliCATE THE
tests used on harddrive - butterfly pattern, for example.
     /|   /|         / -------
    / |  / | .   \ \/   /|
   /  | /  |/ \   \/\  / |
  /   |/   /---\  /\ \/  |
 /        /     \/  \    |
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