摘要:
Management information necessary to manage storage media in a mass storage system. A rotatable cell drum has a plurality of cells arranged in a plurality of cell columns disposed in spaced circumferential relationship parallel to the axis of the drum and in a plurality of shelves disposed in spaced relationship transverse to the axis of the drum. A housing of the cell drum has an opening which confronts N cell columns of the cell drum, wherein 1.ltoreq.N