The proposed the multilayer optical disk with slant tracking grooves, which are similar to the blazed diffraction grating grooves. The different incline of the grooves in the neighbor layers of the multilayer optical disk considerably reduce the interlayer cross-talks. This allows to decrease the distance between the neighbor layers resulting in a high 3D capacity. Both consecutive and parallel information reading from the different layers are possible. Parallel reading in this case can be performed with enhanced speed. Also, the capacity can be increased due to the exclusion of the spaces between data recording grooves that exist in the conventional disks. This advantage is employed in the design of the proposed disk making it fully compatible with the standard reading system.