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 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.

An optical disc apparatus includes: a controller configured to acquire information of an access result and access positions on an optical disc when an optical disc drive unit configured to optically access an optical disc optically accesses the optical disc; and a storage configured to store the information acquired by the controller.

A disc tray includes a bottom wall including an outer periphery and an inner rib supporter supporting the lowermost disc from below. The bottom wall is thickened from the outer periphery toward the inner rib supporter. The lowermost disc includes a data recording area, an inner rib, and an outer rib. When the lowermost disc is stationary, the outer rib of the lowermost disc and the upper surface of the bottom wall are separated by a gap. When the lowermost disc is inclined in such a manner that part of the outer rib of the lowermost disc comes into contact with the upper surface of the bottom wall, the data recording area of the lowermost disc and the upper surface of the bottom wall are separated by a gap greater than thickness of the outer or inner rib.

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.

Provided is a disc archive apparatus, including: a tray conveying robot that selects a specified disc tray and conveys the specified disc tray; a rotatable turn table, the disc tray conveyed by the tray conveying robot being placed on the rotatable turn table; a disc conveying picker for placing the discs from the disc tray placed on the turn table into the plurality of drives of the disc drive; and a controller that controls an operation, in which the controller performs a control operation including performing processing including recording or reproduction on/from the disc taken out from a disc tray currently placed on a first area of the turn table, rotating the turn table thereafter, and performing processing including recording or reproduction on/from a next disc tray placed on a second area of the turn table.

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.

A disc tray includes a bottom wall including an outer periphery and an inner rib supporter supporting the lowermost disc from below. The bottom wall is thickened from the outer periphery toward the inner rib supporter. The lowermost disc includes a data recording area, an inner rib, and an outer rib. When the lowermost disc is stationary, the outer rib of the lowermost disc and the upper surface of the bottom wall are separated by a gap. When the lowermost disc is inclined in such a manner that part of the outer rib of the lowermost disc comes into contact with the upper surface of the bottom wall, the data recording area of the lowermost disc and the upper surface of the bottom wall are separated by a gap greater than thickness of the outer or inner rib.

A disc device according to the present disclosure is a disc device for supplying a disc to each of a plurality of disc drives, and includes a carrier for retaining a plurality of discs in a stacked state, for separating one disc from the retained plurality of discs above a tray that is ejected from an arbitrary disc drive, and for placing the separated one disc on the tray. The carrier includes a first support claw that is capable of moving forward and backward below the plurality of discs, a second support claw that is capable of moving forward and backward into and out of a gap between a bottom disc and a disc that is adjacent to the bottom disc, among the plurality of discs, and a separation claw that is capable of moving forward and backward into and out of the gap and of pushing the bottom disc downward, where the bottom disc is separated from the retained plurality of discs by moving the first support claw, the second support claw, and the separation claw forward and backward, and pushing the bottom disc downward by the separation claw.

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.