Plasmon UDO60WO Ultra Density Optical Media UDO60GB WORM MEDIAPlasmon UDO60WO Ultra Density Optical Media UDO60GB WORM MEDIA Product Description: UDO True Write Once media uses a totally different Phase Change recording surface than the Rewritable media. Unlike Rewritable media, the WORM (Write Once Read Many) recording surface cannot be erased or altered, giving True Write Once media the highest possible record authenticity. This level of data integrity cannot be matched by magnetic disk or tape technologies