Is a double-layered DVD ALWAYS double-sided ? Or are the single-sided double-layered DVDs ?
Jeff Korn
Is a double-layered DVD ALWAYS double-sided ? Or are the single-sided double-layered DVDs ?
In other words: If I have a double-layered DVD do I have to flip the DVD on the back side to access
the remaining 4.5 GB ?
Furthermore if there are single-sided, double-layered DVDs (=with capacity close to 9 GB):
Do these DVDs exist only pre-burned from manufacturer or are there writable (e.g.DVD+RW)
single-sided doble-layered buyable DVDs as well? (I have never seen such DVDs)
Jeff
Ken Maltby
"Jeff Korn" <un...@lycos.co.uk> wrote in message
news:452f46e8$0$13091$9b4e...@newsspool2.arcor-online.net...
No, they seldom are. Yes there are single-sided double-layered DVDs.
Only if it is a double sided, and then you would be accessing an
additional ~9 GB.
Yes, but they are not RW disks. There are double-layer DVD+R and
DVD-R media generally available, (More DVD+R)
Try a Google, once in a while.
Luck;
Ken
Frank
in article <Re: Is a double-layered DVD ALWAYS double-sided ? Or are
the single-sided double-layered DVDs ?>,
"Ken Maltby" <kma...@sbcglobal.net> wrote:
Jeff:
Factory-replicated injection-molded/stamped 120mm (12cm) diameter DVDs
come in the following flavors, although I've personally never seen a
double-sided disc. DVD-5 and DVD-9 are the two most commonly used
formats.
DVD-5 - single-side, single-layer - 4.7 GB capacity
DVD-9 - single-side, dual-layer - 8.54 GB capacity
DVD-10 - double-side, single-layer - 9.4 GB capacity
DVD-14 - double-side, one side is single-layer and the other side is
dual-layer - 12 GB capacity
DVD-18 - double-side, double-layer - 17 GB capacity
--
Frank, Independent Consultant, New York, NY
[Please remove 'nojunkmail.' from address to reply via e-mail.]
Read Frank's thoughts on HDV at http://www.humanvalues.net/hdv/
Richard Crowley
> As the subject already told:
> Is a double-layered DVD ALWAYS double-sided ?
No. Likely most dual-layer discs are single-side.
Many (most?) commercial DVDs of Hollywood
movies, for example are single-side, double-layer.
The ones that are double-side, at least in my
collection, are the ones with different programs
on each side, like widescreen/letterbox on one
side and pan-n-scan on the other side, etc.
> Or are the single-sided double-layered DVDs ?
Yes, there are. Both commercial moulded ones and
field-burnable DVDR.
> In other words: If I have a double-layered DVD do
> I have to flip the DVD on the back side to access
> the remaining 4.5 GB ?
No. "Double-layered" implies that both layers are
on the same side. If there were only one layer on
each side, it would be called "double-sided".
> Furthermore if there are single-sided, double-
> layered DVDs (=with capacity close to 9 GB):
> Do these DVDs exist only pre-burned from
> manufacturer or are there writable (e.g.DVD+RW)
> single-sided doble-layered buyable DVDs as well?
> (I have never seen such DVDs)
I did a Google search for: dual-layer dvd
and got > 10 million hits. For example...
http://www.cdfreaks.com/article/129
the dog from that film you saw
"Jeff Korn" <un...@lycos.co.uk> wrote in message
news:452f46e8$0$13091$9b4e...@newsspool2.arcor-online.net...
a double layer dvd is one single side - it's very rare to find one that's
double sided AND double layered - a dvd 18.
there are blanks available that are double layer but they cost a whole lot
more than single layer ones.
--
Gareth.
A french man who wanted a castle threw his cat into a pond.
http://www.audioscrobbler.com/user/dsbmusic/
Bill's News
"Schindler's List" is an example of double-sided, dual-layered (DVD18
actually 17) flipper - the movie is 196 minutes. One of the best
quality Hollywood movie transfers to DVD which I've come across.
Many episodic TV releases - "West Wing," "The Shield" to name but two,
are DVD18s for all but the last disc which was created as necessary to
fill out the set.
But no, a single sided disc may be dual layered and a double sided
disc may be single layered on both sides or dual/single.
The future may hold some flavor of HDVD on one side with DVD9 on the
other - there is no end to marketing asininity.
DVD-RAM is available two sided at 9 gig total, but I've not yet seen R
or RW media other than one sided at either 5 or 9.
ratny
news:452f46e8$0$13091$9b4e...@newsspool2.arcor-online.net:
Commercial DVDs are normally marked DVD5 denoting a single-layer DVD or
DVD9 for a double-layer DVD. The difference beside the capacity is the
format how the data is stored and on a double-layer DVD both these layers
ar on the same side of the DVD and you don't have to flip the disk to
access the second layer. The reader finds it by itself.
Rat