You said DISK...
TOTALLY Freudian mis-hearing there... :^b
I haven't run into this (yet?), but I've noticed the noisy drive phenomena come up a time or two during really huge operations, which always gets my attention because noise = wear and tear.
I don't know if it's a related issue, but I always make it a point to get drives with the biggest built-in cache I can get (and usually found that shopping around gets this for about the same price anyway!).
On semi-related noise fronts, I recently installed (read: all but forced) some really spiffy drive fans for my drives recently. One of them wasn't in there even a day before it started making this odd noise that turned out to be that the (cheap plastic in the) fan had cracked.
Needless say, I had to replace it and do some more work, and now the whole rig is the quietest I could get (reading the dB levels helps!). Alas, I had to take a dremel(!) to my case to put in (and deburr) the screw-holes that Gateway was too cheap to have spec'ed in the first place, along with coaxing parts in veeery carefully as to not mess up my memory.
But there's nothing like that studly feeling that comes from making a part _behave_ by force (using power tools, no less), and the satisfaction that I can run my gear 24/7 knowing it's pampered and smooooooth.
One of the units (that pokes out front) has these blue LEDs on the fans that look sweeeeet, but they don't have an off switch and are a bit bright, especially at night. I'm seeing if I can rig up a circuit that uses a photo-resistor to adjust the light level of all my LEDs so they can dim as the lights go down. I just need a clever way to junction it all smoothly. I might even put in a knob or switch for custom-setting it all.
Some of the best ideas are things that should've been there from the get-go. =^)