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The compatibility issue has been significant enough for Sony,
Philips, Hewlett-Packard, and others to design a different DVD writing technology: DVD+RW.
DVD+RW technology makes it possible to write as much as 3 gigabytes on one side of a DVD
disc; moreover, it is able to record on both DVD+RW discs as well as CD-R and CD-RW discs.
However, this compatibility comes at a cost: DVD+RW may provide higher data storage levels
at present, but will ultimately be limited to lesser data storage levels than their
DVD-RAM kin in future generations of writers. Furthermore, this is not the only compatibility issue that must be dealt with. Both DVD-RAM and DVD+RW require slight DVD player modifications in order to make them DVD-writer-disc readable; this prompted Pioneer to create the DVD-R/W standard, which is readily readable in current DVD players and needs no hardware modifications. NEC was most concerned over being able to hold two hours of video on one side of a DVD disc; they created the MMVF standard, which is capable of holding 5.2 gigabytes on one side of a DVD. |