Hard drives remain the last great bottleneck in performance computing.
Processors and RAM constantly get faster and more complex, due to being
solid state electronics. Since hard drives consist of moving parts, they
have been left behind in this race. Sure solid state drives have become
available in the past year, but they are extremely cost prohibitive. So
over the years companies have had to find creative ways of squeezing
more and more performance out of the 50 year old hard drive. Western
Digital is one of those companies.