Disc archive apparatus

A disc archive apparatus, comprising:

• a plurality of disc trays,
• wherein each disc tray of the plurality of disc trays is configured to house N columns of M stacked discs (N and M each indicate a positive integer not less than two);
• one or more disc tray racks each configured to house the plurality of disc trays;
• a tray conveying robot configured to:
• select a specified disc tray of the plurality of disc trays from the one or more disc tray racks;
• and
• convey the specified disc tray;
• a rotatable turn table, wherein the specified disc tray conveyed by the tray conveying robot is placed on the rotatable turn table;
• a disc drive including a plurality of drives arranged in an (M×N) matrix pattern;
• a disc conveying picker configured to place discs from the specified disc tray placed on the rotatable turn table into the plurality of drives of the disc drive,
• wherein the disc conveying picker is between the rotatable turn table and the disc drive;
• and
• a controller configured to:
• record or reproduce on/from a first disc taken out from a first disc tray of the plurality of disc trays,
• wherein the first disc tray is currently placed on a first area of the rotatable turn table;
• rotate the rotatable turn table, based on completion of the recording or the reproduction on/from the first disc taken out from the first disc tray;
• and
• record or reproduce on/from a second disc tray of the plurality of disc trays,
• wherein the second disc tray is next to the first disc tray currently placed on the first area of the rotatable turn table, and
• wherein the second disc tray is placed on a second area of the rotatable turn table.