It also features 16MB of cache, uses SATA 3Gb/s, and consumes only 1.8W of power when active and 0.8W when idle. Additionally, the Travelstar Z7K320 offers up to 18% more performance than the 5400RPM Travelstar Z5K320, which features 8MB of cache, and consumes only 1.6W of power during read/write and 0.55W when idle.
Hitachi's CinemaStar drives are "specifically designed" for A/V streaming devices, such as set-top boxes, PVRs, portable video players, DVR-enabled TVs, and video surveillance systems. The fifth-generation 2.5-inch 5400RPM Z5K320 features 8MB of cache along with an "improved protection scheme for power fluctuation and enhanced Thermal Fly-Height Control for improved error rates."
The drives are expected to reach mass production in August, but there's no official release date or pricing at this point.