Fujitsu Limited today announced that it has developed two new 500 GB 2.5" hard disk drive (HDD) models that feature a rotational speed of 5,400 RPM and deliver industry-leading levels of energy efficiency. The MJA2 BH series will be available from the end of December 2008, and the MJA2 CH series will be available in the first quarter of the 2009 calendar year.