[metarinka]

Hdd's a pretty well insulated from their own rare earth magnets and I've never seen or been given proof to magnets damaging HDD's (well any magnets that people put close to computers) Furthermore computers already throw off a fair bit of EMI. especially if your case is open aired or acrylic, the added emi of a pump at most would make make your sound card or speakers buzz a little louder, thats about it. Even then most decent mobo's and cases have adequate shielding and most enthusiasts use an add on soundcard which generally are better shielded than the on board kind. To my knowledge the type of EMI and magnetic interference needed to whack out comp parts, you probably wouldn't be putting close to computers anyways.