Dual Layer DVD

With the introduction of dual-layer DVD+R technology comes the next important milestone in the drive to continually improve and expand the optical data storage options available to consumers..

It will benefit from the additional storage capacity of the DVD+R disc as it will enable users to record 4 hours of DVD-quality video or 16 hours of VHS-quality video, without the need to turn over the disc !!!!!!

Users will be able to archive up to 8.5 Gbytes of computer files on a single disc, which almost doubles the storage capacity compared with the 4.7Gbytes for the single-layer DVD+R discs currently available ...

Working of Dual Layer Dvd -------

The dual-layer DVD+R system uses two thin embedded organic dye films for data storage separated by a spacer layer.
Heating with a focused laser beam irreversibly modifies the physical and chemical structure of each layer such that the modified areas have different optical properties to those of their unmodified surroundings.
This causes a variation in reflectivity as the disc rotates to provide a read-out signal as with commercially pressed read-only discs.

Wat else are we waiting for ??????