Patent ID: 6973660

Claim:
A disc drive apparatus, configured to employ a single spindle motor to drive both a first disc cartridge, having a first cartridge which houses a first disc and a first pair of positioning holes in the first cartridge, and a second disc cartridge, having a second cartridge which houses a second disc the outer diameter of which is equal to that of said first disc and a second pair of positioning holes in the second cartridge; characterized in that positioning shaft placement means is provided, such that when said first disc cartridge is driven, the positioning shaft placement means places positioning shafts in positions corresponding to said first pair of holes, and when said second disc cartridge is driven, the positioning shaft placement means places positioning shafts in positions corresponding to said second pair of holes, wherein a tray is provided having a first placement area, on which said first disc cartridge is placed, and a second placement area, on which said second disc cartridge is placed, and said first placement area and said second placement area spatially overlap.