Patent ID: 6882598

Claim:
A disk reproduction apparatus capable of accommodating a plurality of disks in disk mount areas and randomly accessing any track in any disk in the disk mount areas, said apparatus comprising: means for discriminating whether a track corresponding to a disk number entered by a user is a track of a first type of disk or a second type of disk, and when the track is discriminated to be a track of the second type disk, for further discriminating what is a sub-type of the second type disk; means for requesting the user to enter a track number immediately after entering the disk number, when the discriminated track is a track of the first type of disk; and means for requesting the user to enter a group number in a distinct entering form corresponding to the discriminated sub-type of the second type disk and then requesting to enter a track number after the group number is entered, when the discriminated track is a track of the second type disk.