Abstract: A optical disk cartridge for a new generation of optical disk storage technology. Notches are formed in the front-edge corners of the cartridge to identify the cartridge as containing an optical disk of a new generation. When a notched cartridge is inserted into a previous generation disk unit, the notches prevent the full-insert detection switch from activating, thus preventing the disk from spinning-up and being accessed. An optical disk drive unit is also provided, in which the full-insert detection switches are repositioned as to not be in vicinity to the notches of the optical disk cartridge. Thus, the optical disk drive unit of the new generation variety will spin-up disks in cartridges have notches as well as older cartridges without notches, providing backward compatibility.

Abstract: A method and apparatus for manufacturing information storage devices is described herein. Two embodiments of the invention are disclosed. In particular, the invention includes, but is not limited to, a bearing insertion device, a lens insertion device, a coarse coil gluing tool, a spring gluing tool, a device for gluing pole pieces, a pentaprism insertion and inspection tool, a constants and transfers test, an optics module alignment device, wedge, microprism and beamsplitter insertion devices, a read channel alignment test, a mass balance attachment invention, a position sensor alignment tool, an invention for the attachment of focus and radial coils, a quality control test for test an optical storage device prior to insertion of the objective lens, and a servo system test. The invention described herein is designed to manufacture information storage devices with increased quality and efficiency.