Abstract: A safety system for online servicing of a media library is provided, wherein the library comprises a plurality of media storage cells and at least one media picker robot that moves along the media storage cells, and wherein the library is contained within an enclosure having at least one access means. The safety system detects whether the access means in the enclosure is open or closed and operates the robot in the media library in one of two corresponding modes. If the access means is closed, the robot operates in a normal mode at a first specified speed. If the access means is open, the robot operates in a safe mode at a second specified speed that is slower then the first speed of the normal mode. In another embodiment, while in safe mode, the picker robot is excluded from moving within a restricted zone in the library.

Abstract: A storage library which enables capacity expansion without additional robotics hardware includes a frame, first and second modules having respective cells, and a robot. The frame supports the first module at a first frame length position such that the first cells are positioned at the first frame length position and along the periphery of a channel extending within the frame interior through the frame length. The frame supports the second module when the second module is mounted to the frame such that the second cells are positioned at the second frame length position and along the channel periphery. The robot has a support connected to the frame and a picker movably connected to the support. The picker moves through the channel to manipulate media elements held by the first cells, and to manipulate media elements held by the second cells when the second module is mounted to the frame.