Re: Is this a non dual layered DVD drive?

From: james (jjames700_at_earthlink.net)
Date: 05/08/05 

Date: Sun, 08 May 2005 21:43:00 GMT

"Arne Schmitz" <arne.schmitz@mmweg.rwth-aachen.de> wrote in message news:3e5sgqF1b8glU1@news.dfncis.de...
> Michael Juntunen schrieb:
>
>> I am assuming that even though I have used this drive to watch movies it
>> can not read the dual layered disc properly.
>
> I don't think so. Every DVD-drive should be able to read dual layered discs.
> Most video DVDs are in fact dual layered. Is the DVD you have gotten a
> copy? Some drives are picky about DVD-Rs, e.g. they want a lead out (which
> is optional for DVD-Rs) or don't like the medium at all.
>
> Arne

Not all DVD drives can read PC-Recordable , Dual Layer disks. Commercial, dual layer dvd's like the retail boxed set contains,
are not recorded on the same type of media as the PC-Recordable Dual Layer disks.
Dual Layer DVD's (for PC's) use two different DYE layers and the reflectivity between those layers is lower
than the reflectivity of commercial DVD's. A lot of older DVD-ROM/DVD-R/W (PC) drives have problems reading the PC recordable
Dual Layer disks. I have seen notices on the packages of Dual Layer disks, stating that older PC (and even some home DVD
players) may not be able to read the disks.
I have encountered this problem myself. I can record a Dual Layer DVD on my newer PC with a Dual Layer recorder in it and it
will work fine in several other pc's. But, on an older system I have with just a DVD-ROM drive in it, it would not read it.
Tried the boxed DVD's from a friend, and they read just fine in the same PC. And my PC-recorded Dual Layer DVD read just fine in
his system. So, the problem is more likely to be a drive that does not have a powerful enough laser in it to read the different
dye layers easily.
james

 

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