Peter B Van Campen wrote:
http://www.dvddemystified.com/myths.html
and #9 sez <snip>
Did you write to the DVD Myths web site to advise than that they are wrong? That was a straight cut-n-paste fron their page.
Nothing on that page is from anywhere more recent than July 2001, but the dual-layer --data-- standards (both of them) weren't announced until September-October 2003. There is a relevant passage, around para. 7.4.10 I believe, in the more recent FAQ page at http://www.dvddemystified.com (I'd post the exact URL, but Mozilla has crashed on me about 5 times this evening when I try to load the FAQ page). Yes, there has been -a- dual-layer standard around since the very first days of DVD (afaik, the DVD/Video and DVD-ROM formats use essentially the same physical layer, the only real difference is in the encoding of the data). But today, there are potentially no less than three dual-layer standards, and I am not certain that a DVD+RW disc can be read by any old DVD drive at all, because the physical layer alone might be vastly different from anything the DVD Forum has defined -- if it were not, then you would be able to drop any DVD/RW disc into any DVD/RW drive and write to it, and I think that is not possible. So once again, until I am certain that the physical medium used by DVD+R9 is the same as the physical medium used by DVD-R9 is the same as the medium used by DVD/Video, I am not going to say either "yes" or "no", and I am sure as blazes NOT going to tell anyone that they are wrong. If you think this is all very confusing, wait until the high-definition DVDs hit the market; BluRay and HD-DVD are merely the two front-runners in that war (yes, most of them will be able to read existing video DVDs, that is part of all the standards I am in any way familiar with at this time -- you just won't get the extra quality associated with HDTV. But don't expect that a BluRay drive will necessarily be able to read a DVD-R9 data disc).