Patent ID: 7017169
Filing Date: 2006-03-21
Classification: G11B

Abstract:
1. A disk cartridge, comprising: a first cartridge containing a first disk recording medium having a first diameter, said first cartridge having plural holes, which have different radial positions with respect to a disk center respectively, the plural holes being indicative of a relationship between said first diameter and a predetermined diameter of a second disk recording medium contained in a second disk cartridge that is different from said first diameter of said first disk recording medium contained in said first cartridge, wherein said holes are indicative of said disk recording medium diameters of each of said first and second disk recording mediums or an outermost operational movement of a pickup of a disk recording and reproducing apparatus for receiving said first cartridge or said second cartridge and reading data from or recording data to said first disk recording medium or said second disk recording medium, and wherein a hole is provided in said second cartridge, and a hole in said first cartridge is provided at the same coordinate position or a same radial position as said hole in said second cartridge with respect to a disk center location in said disk recording and reproducing apparatus, regardless of the respective diameters of said first and second disk recording mediums in said first and second cartridges.