Time keeps on ticking, and hard drives keep on growing. With desktop HDDs already sitting at 2TB and the solid state arena growing larger members each month, it only makes sense to see a new benchmark set for the world of 2.5″ notebook drives. Toshiba has today introduced what it’s calling the industry’s largest 2.5″ laptop hard drive, and with a capacity of 640GB, we can’t really argue.Previously, most notebook hard drives topped out at 500GB, but Toshiba’s MK6465GSX adds another 140GB to the pile. The drive