I had a ST3500820AS-Seagate sata with firmware version SD25.
I downloaded Diskeeper.ProPremier.2008_12.0.758.0 and kept it on "auto-everything" (I-fast,auto-defrag etc).
The computers is powered 15 hrs continuously. Usually downloading & seeding.
After a week the drive crashes.. i mean the computer does not boots with it connected to it. Same results on different computers.

When diskeeper was on..the orange light was always bright. Not going off even once.

I had not opened my cabinet. I had not moved my computer. I woke up one morning to find my hard drive failed.
So did my harddrive crash coz diskeeper kept "spinning" it too much for too long ?

or its just a co-incidence.