Toshiba America announced today that it will be adding two models to its line of 2.5-inch, 5,400rpm hard drives for use in mobile PCs, all-in-ones, set-top boxes, and similar units.

Toshiba America announced today that it will be adding two models to its line of 2.5-inch, 5,400rpm hard drives for use in mobile PCs, all-in-ones, set-top boxes, and similar units.

The MK7559GSXP will have a capacity of 750GB, and is a standard 9.5mm, two-platter design. It has an areal density of 541.4Gb per square inch (GB/in2), which Toshiba says is the industry's highest; 8MB of buffer memory; and an estimated average seek time of 12ms. The MKxx59GSM series will also have an 8MB buffer, but its areal density of 482 GB/in2 will result in a slightly larger size (12.5mm) to accommodate its 750GB and 1TB storage capacities.

Both drives use Toshiba's "silent seek" technology and energy efficiency techniques to keep the drives both quiet and cheap to run. In addition, the two drives use the that is rapidly being introduced into hard drives at all levels of manufacturer. The method uses 4KB per sector rather than the traditional size of only 512 bytes.

Toshiba expects the MKxx59GSM series and MK7559GSXP drives to ship to PC manufacturers and distributors within the next few months.