Rikei Co has developed and begun marketing new drives in its HDU series of fixed disk units which are designed for use with DEC’s MicroVAX family: the new HDU 53 series uses 305Mb 5.25 Winchesters and the HDU 87 series uses 573Mb 8 drives: the company looks to sell 130 of the subsystems in the first year at $17,000 for the HDU 53, and from $30,866 to $60,000 for the HDU 87 subsystems.