PX-Q840U/ PX-806SA Installation and Users Manual
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6. Frequently Asked Questions
Q: Is the PX-Q840U and PX-806SA a DVD Multi Recorder?
Yes. The DVD Multi specification requires that DVD Multi Recorders
read and write DVD-ROM (prerecorded), DVD-R (General), DVD-RW
and DVD-RAM discs. Because your Plextor drive conforms to the DVD
Multi specification, it can read and write the formats used by today’s
computers and consumer electronic (CE) DVD devices. (Note that DVD
Multi does not prescribe that devices should accommodate DVD-RAM
cartridges or 8-cm discs.)
Q: Which is better, DVD+R and DVD+RW? Or DVD-R and DVD-
RW?
A: Neither is “better” or “worse.” They’re just different standards, like
English versus metric measurement.
Different manufacturers support different standards. The DVD+R and
DVD+RW formats are supported by Plextor, Philips, Sony, Hewlett-
Packard, Dell, Ricoh, Yamaha and other manufacturers. DVD-R, DVD-
RW and DVD-RAM are also supported by Plextor, as well as Panasonic,
Toshiba, Apple Computer, Hitachi, NEC, Pioneer, Samsung and Sharp.
No matter which format a DVD disc is recorded in, it can be read by
most commercial DVD-ROM players.
Q: What's the difference between "double layer" and "dual layer"?
A: Nothing, really. It's simply a difference of opinion within the industry
about how to label media and drive capabilities. DVD+R DL (as named
by the DVD+RW Alliance) stands for DVD+R Double Layer. DVD-R
DL (from the DVD Forum) stands for DVD-R Dual Layer. Whether
your DL media is labeled "double layer" or "dual layer," the PX-Q840U
and PX-806SA can handle it.
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