WD Black

The newer WD1003FZEX has one platter. The older WD1002FAEX uses two platters.

The single platter drive has a higher density, so should be a little quicker in some operations, should run cooler and use less power.
 
I don't think the old one is terrible, but it does have a noticeable whine when running, so I don't think you'd want it at head height on your desk.
 
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