Seagate 10 TB Barracuda Pro - development continues - bigger, better, cheaper.

Did you want more storage space on your PC? Seagate may have heard you, because on Tuesday morning, the world's "largest" hard drive to date hit the market.

At 10 TB, the Barracuda Pro not only boasts a very large capacity. Seagate is also aiming to make the drive fast, with the installation of a massive 256 MB cache and a drive that spins at 7,200 rpm.

Of course, "performance" may sound like a redundant talking point in the age of SSD hard drives that can easily hit 1.5Gbps when reading from it, but all things considered, this 3.5-inch Barracuda Pro is still pretty lively, with a sustained transfer rate of 220MBps.

The Barracuda Pro uses Conventional Magnetic Recording, and is not sealed and filled with helium or exotic magnetic technology to achieve the large storage capacity. Spokespeople say it is built on a seven-disk design, which usually means higher power consumption due to the number of spinning disks. Seagate states that the drive is one of the more efficient ones currently available.

According to Seagate, the drive consumes only 6.8 watts in search mode and 4.5 watts in idle mode, making it a relatively low consumer.

How does the drive compare to the big SSD hard drives? Samsung recently announced that they have the "world's largest SSD" drive ready. It costs $1,500 for 4 TB, or about 37 cents/gigabyte. The new Seagate Barracuda Pro comes in at around 5 cents/gigabyte.