Trusted Reviews looked at the Seagate Barracuda 7200.10 750GB Hard Drive

The major feature of Seagate's new Barracuda 7200.10 hard drive is
the use of perpendicular recording technology that boosts the capacity of the
drive by an impressive percentage. Perpendicular technology stands the
particles of magnetic media on their end instead of laying them on their side. The result is a significant increase in areal density so we've leapt from
the 500GB of the Barracuda 7200.9 to an enormous 750GB from the Barracuda 7200.10 family.

Seagate Barracuda 7200.10 750GB Hard Drive Review