The invention discloses a disc library storage system including a disc library, a disc drive tower and a disc transport device. The disc library is for placing multiple discs. The disc drive tower includes multiple disc drives for reading/writing data. The disc transport device is used for moving the discs to the disc drive tower from the disc library and moving the discs to the disc library from the disc drive tower.

A disc cassette includes a curved portion configured to hold multiple discs. A platform portion abuts the curved portion. A movable bale is configured to maintain discs securely in the disc cassette except when rotated off the discs.

A magazine management device stores a plurality of magazines in which a plurality of optical discs is housed. The magazine management device includes a case that supports the plurality of magazines, a plurality of partitions that divides the case so as to form a plurality of regions in which the magazines can be stored one by one, an antenna that transmits a radio wave for asking a radio identifier provided to the magazine for a response and receives a radio wave of the response transmitted from the radio identifier, and an arithmetic processor that receives information obtained from the radio wave of the response received by the antenna.

A disc cassette includes a curved portion configured to hold multiple discs. A platform portion abuts the curved portion. A movable bale is configured to maintain discs securely in the disc cassette except when rotated off the discs.

Utilities (e.g., systems, apparatuses, methods) that reduce robotic assembly contention in media element storage libraries by rotating (e.g., flipping, swinging, etc.) a robot arm of a first robotic assembly mounted over a first of first and second spaced storage arrays in a storage library into a first position between the first storage array and a central reference plane disposed between and parallel to the first and second storage arrays to allow a robot arm of a second robotic assembly to slide or otherwise move past the robot arm of the first robotic assembly (e.g., in a direction along or parallel to an x-axis parallel to the first and second storage arrays), even when the robot arms of the first and second robotic assemblies are disposed at the same height (e.g., along a z-axis that is perpendicular to the x-axis) within the storage library.

An apparatus includes a first jaw device, a second jaw device, and a disc sensor configured to sense presence of a storage disc between the first jaw device and the second jaw device. The first jaw device and the second jaw device form a gripper device configured to clamp a particular portion of a storage disc including an arc segment along an outer edge of adjacent surfaces of the storage disc.

A data-center-module deployment apparatus may include a gantry robot adapted to move a sliding element parallel to a face of an information technology rack, where the face of the information technology rack exposes information technology device modules stored by the information technology rack. The apparatus may also include at least one track that is coupled to the sliding element and that extends away from the sliding element and toward the face of the information technology rack. In addition to the track(s), the apparatus may include an engaging element that is adapted to move along the track(s) and to engage with one or more of the information technology device modules stored by the information technology rack, such that the engaging element is adapted to insert into the information technology rack and remove from the information technology rack one or more of the plurality of information technology device modules.

A computer-implemented method, according to one embodiment, includes: maintaining a reference count and an access count for each of a plurality of objects stored in an optical media storage system, using the reference count and access count to create a popularity metric for each of the plurality of objects, for each medium having one or more of the plurality of objects, creating a medium popularity metric based on the popularity metrics of the one or more objects on the respective medium, and using the medium popularity metric of each respective optical medium to arrange the optical media in the optical media storage system. Other systems, methods, and computer program products are described in additional embodiments.

A magazine management device stores a plurality of magazines in which a plurality of optical discs is housed. The magazine management device includes a case that supports the plurality of magazines, a plurality of partitions that divides the case so as to form a plurality of regions in which the magazines can be stored one by one, an antenna that transmits a radio wave for asking a radio identifier provided to the magazine for a response and receives a radio wave of the response transmitted from the radio identifier, and an arithmetic processor that receives information obtained from the radio wave of the response received by the antenna.

A computer-implemented method, according to one embodiment, includes: maintaining a reference count and an access count for each of a plurality of objects stored in an optical media storage system, using the reference count and access count to create a popularity metric for each of the plurality of objects, for each medium having one or more of the plurality of objects, creating a medium popularity metric based on the popularity metrics of the one or more objects on the respective medium, and using the medium popularity metric of each respective optical medium to arrange the optical media in the optical media storage system. Other systems, methods, and computer program products are described in additional embodiments.