DK239A-65 Hard Disk

As more hard disk drives were installed in notebook computers and other portable devices, vibration and shock resistance requirements became more stringent. Hitachi released the DK239A-65 in November 1998, which featured a magnetic-head load/unload mechanism, a first for Hitachi. As more people began travelling with and using notebooks with built-in 2.5-inch hard disk drives on the road, notebooks and other portable devices had to be built with more robust shock resistance.