A big cache usually means big performance, but there comes a point where adding more will do nothing for you except raise the cost. Don't pay more for a bigger cache if the performance gains are only marginal. Other factors such as rotational speed and areal density play a bigger role in the performance of a hard drive. Platter - The disk itself. The platter is coated in the magnetic material that stores the 0's and 1's.
Most hard drives have multiple platters.
Most platters are 3.5 inches in diameter, and should not vary in any way that would affect your buying decisions. INT Media Group, Incorporated. All Rights Reserved.