Of course, the same considerations come into play for laptops, though one obviously wouldn't want to lug around an external FireWire drive enclosure with one's shiny new PowerBook. Though the author of the article reports good results from swapping his PowerBook's drive for a 7200RPM notebook drive. (Whether or not this is a good idea would depend on how much extra heat a faster drive generates, and what tolerance the design of the laptop in question has for hotter-running hard drives.)
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