Once upon a time, people didn't need lots of hard drive space, but that was the era of the typewriter. With media and software all being available on one computer, capacity is king and it's good to be the king. Western Digital can sit back and admire their throne for now.
The company's highest-spec hard drives are now 4TB, meaning you can double down on the more common 2TB drives. The WD Black drive brings 7200rpm spin speeds, dual actuator technology, a 64MB cache and a dual processor. Oh, and support for 6GB/s transfer speeds through SATA. It's a bit fast.
The dual actuator technology they speak of is a head positioning system for more accuracy over data tracks. The first, primary, actuator provides coarse displacement. It's conventional, in other words. The second actuator uses piezoelectric motion, fine tuning the head's positioning to make it that bit more accurate. We never said it was simple.
WD's own MSRP is $339.00, which seems like a lot. Hitachi's Deskstar 7K4000 is also 4TB in size, as is their Touro Pro DX3 external. Still, if money comes second to speed and silence, Western Digital should have your back.S
Source: Western Digital