Toshiba sent out a press release earlier today, announcing its new line of high performance 2.5-inch hard disk drives. These new drives offer a 7,200rpm rotation speed, 8MB buffer and 3.0Gbit/s Serial ATA interface. Toshiba has also reduced the seek noise of the 400GB MK4058GSX by 2dB for near silent operation.

Toshiba Corporation today announced a new line-up of high performance 2.5-inch HDDs, including a low-noise flagship model that boosts areal density to 477Mbit/mm2 (308Gbpsi) to achieve a capacity of 400GB on just two platters, plus five drives that bring new levels of performance and 7,200rpm rotational speeds to the company’s full range of storage capacities.

Mass production of the 400GB MK4058GSX will start from September, targeting notebook PC and consumer electronic applications. Mass production of the 7,200rpm drives will start in August. The line-up includes the 320GB MK3254GSY and models with 80, 120, 160 and 250GB capacities.
If you'd like to read more, Toshiba's entire press release can be found here.