Patent ID: 7180701

Claim:
A magazine-based data cartridge library comprising: a frame; a shelf system, operatively attached to said frame, for supporting at least two data cartridge magazines and comprising at least one shelf; a drive that is operatively attached to said frame; a cartridge transport device, operatively attached to said frame, for moving a data cartridge between a data cartridge magazine and said drive; a magazine transport device, operatively attached to said frame, for moving a data cartridge magazine; and an operator alterable space capable of accommodating at least a shelf module or a drive module interchangeably located within a space defined by said frame, said shelf module capable of supporting at least a third data cartridge magazine and said drive module capable of comprising at least a second drive; wherein said operator alterable space comprises a library mounting structure for receiving one of said modules, a first side that is exposed to said cartridge transport device and a second side that allows an operator to attach one of said modules to said mounting structure.