The Hitachi E7K1000 is an enterprise class drive that gave us above average performance in nearly all tests. The large 32MB cache worked well at reducing the latency and the higher density platters helped to increase sustained transfer speed.
On the surface 1TB drives are not all that exciting, but once you dig deeper these drives are starting to become the workhorse of the enterprise and SOHO markets. Their new found price point has played a big part in that. Pair the initial cost of ownership with the new "green" feature set that reduces the operational costs and you have a win / win for enterprise users; less drives with a lower cost of operation for more space in a smaller number of servers.
Overall, the Hitachi E7K1000 is a good drive for the enterprise market. Availability is a little on the shallow side and the cost is a bit higher than the desktop versions, but in the server room the additional features of the enterprise variant are worth the additional cost. Incorporated technologies like RVS will even out the additional upfront costs over time since it will add to the drives reliability. Another feature that is often overlooked in enterprise class products is the additional 3 years of warranty over the desktop drive.