What are the different types of DVD-RAM?
There are two types of DVD-RAM cartridges: Type 1 is double sided and Type 2 is single sided. Type 2 cartridges can be removed from their cartridges and Type 1 discs are sealed in the cartridge and are not removable. Single sided DVD-RAM discs, when removed from their cartridge, can be read in current DVD-RAM consumer players and computer DVD ROM drives. Double-sided discs are not removable from their cartridges and can only be played back or written in cartridge compatible drives and players. How does DVD-RAM work? DVD-RAM is different than DVD-R in that it uses re-writable phase change material rather than the write-once organic dye material that comprises a DVD-R and a CD-R. When writing, a laser heats the phase change material in the disc to about 900-1300F, changing its reflective properties from shiny to dull. If the disc needs to be erased, a laser heats the disc again to about 400F to return the disc to its original shiny state. A laser of lesser power is used to read the writt
