I noticed an interesting article @ TweakTown regarding the unbelievable amount of customers who reported serious data loss errors and frequent fail rates. I myself had fortunately no problems at all with my 75GXP HDD but nervertheless this article might solve a few problems for ya. And you might have already guessed it - it's all about cooling. Read more...
I believe not only the platters are operating at a temperature unsustainable, but also the chips - More specifically, the controller chip on the externally visible circuit board of the bottom of the drive, as pictured above (The chip on the far right). If you do not keep this devilishly-warm chip adequately cooled, it will become buggy and unstable, possibly even useless in time if it goes without cooling ? I have no black and white concrete proof of this, however quite possibly this could be a reason for the ?Click of Death? sounds made when the drives become faulty, or at least contributing towards it. To learn more about the IBM GXP HDD failure issue warp 2 TweakTown.