"When it comes to traditional platter drives, the most innovative company on the block is Seagate. Seagate has many firsts under their belt, more than what I could possibly go into in an article about a single drive. Adding to the long string of innovative products is the new Seagate Constellation.2 Series of products.
With a maximum capacity of 1TB and a small 2.5" form factor, the Constellation.2 is already breaking new ground. On top of that, Seagate wasn't content with just a SATA or SAS interface, the Constellation.2 is available in both SATA 6G and SAS 6G. As you might have guessed, the new 2.5" Constellation.2 is a nearline enterprise drive, but unlike the norm in this field the new SATA and SAS Constellation.2 is optimized to be power efficient, using only 3.9 watts at idle."