M836 Disk Pack Unit

This was a high-capacity removable magnetic disk unit announced by Mitsubishi Electric in 1973. It was a equivalent of the IBM3330 magnetic disk unit, and had a memory capacity of 100MB per spindle and a high-speed positioning mechanism which required 30ms on average. This unit was used for data files for mid-size to large computers such as the MELCOM 7000 Series and COSMO Series.