GE Crams 500GB of Data on DVD with Holographic Tech

General Electric Global Research says it has figured out a way to put up to 500GB of data on a regular-sized DVD disc under laboratory conditions. GE says its breakthrough was achieved by writing 3-dimensional patterns that represent data onto a disc made of highly reflective material. The disc then acts as a mirror that makes it possible for a laser to pick up the entire piece of data. GE's process doesn't just put information onto the surface of the disc -- as DVDs and CDs do -- but etches the micro-holographic patterns below the surface of the disc as well.