Abstract: An automatic library system for providing computer access to data carriers therein includes a store for the data carriers, and at least one read/write station for the data carriers having an in/out opening. An intermediate store is arranged adjacent the in/out opening for an intermediate storage of the data carders in at least one intermediate storage position. A controller is provided which is capable of initiating transportation of one of the data carders directly from said store to the in/out opening or from the store to the intermediate store. The controller is also capable of initiating transportation of one of the data carriers stored in the intermediate store to the in/out opening of the read/write station upon a request for the one of the data carders by the computer. In such a manner, operational delays for the automatic library system are significantly reduced.

Abstract: Computer tape cassette storage units store a number or computer tape cassettes during periods of nonuse and are particularly adapted for use in an automated tape cassette archiving and retrieval system. The storage units include at least one shelf unit having a substantially horizontally disposed shelf for supporting a row of computer tape cassettes on edge. Structures are provided so as to minimize (if not eliminate) the possibility that the tape cassettes will become dislodged from the shelf units in the event of mechanical shocks and/or vibrations (e.g., which may occur in an automated system do to a robotic manipulator coming into physical contact with the storage unit). Such structure may take the form of a forward lip against which a portion of the tape cassettes abuts and/or structures which shift the centers of gravity of the tape cassettes rearwardly toward the rear wall of the shelf units upon which they are supported.

Abstract: A process is useful for operating an automatic data carrier archive associated as a memory with a computer. The data carriers are transported to and fro between various stations of the data carrier archive by a control device of the data carrier archive. The stations of the data carrier archive comprise at least one data carrier store and on write/read station for the data carriers. In order to improve the availability of the data carriers, each transport operation corresponds to at least one transport function, a priority is assigned to each transport function, transport functions with high priority are executed with low priority transport functions, and when the computer requests a data carrier in the write/read station, at least the immediate transport between the write/read station and another station is executed with a transport of highest priority.

Abstract: In order to improve a revolving storage facility for tape cassettes comprising a base and a rotary frame rotatable thereon about an axis of rotation and carrying shelf units with cassette compartments for tape cassettes such that the number of cassette compartments is increased while the space requirements is kept as small as possible, it is proposed that the rotary frame comprises a supporting frame which is rotatable about the axis of rotation relative to the base and on which subframes carrying the shelf units are mounted for rotation about subframe axes of rotation arranged sidewardly of the axis of rotation.