 The Magnetic Peripherals division in Brynmawr had produced 1 million disks and 3 million magnetic tapes by October 1979.CDC was an early developer of the eight-inch drive technology with products from its MPI Oklahoma City Operation.Its CDC Wren series drives were particularly popular with "high end" users, although it was behind the capacity growth and performance curves of numerous startups such as Micropolis, Atasi, Maxtor, and Quantum.