Western Digital on Friday began shipping the 500GB Scorpio Blue, the company's largest-capacity notebook drive. Claiming a record in the process, Western Digital says the disk is the only one to make no sacrifices in size or speed to reach its storage goal. The Serial ATA drive is as tall as normal notebook hard drives at 9.5mm (0.37in) and spins at the same 5,400RPM as most other 2.5-inch disks