Dual layer recording? - Club CDFreaks

AbRASiON · 19-10-2003

Guys (and girls),

In reference to this news article.
http://www.cdfreaks.com/news/8135

Does anyone know why it's only 8.5gb and not 9.4 like a "normal" DVD?

It's kind of disapointing because this means 1:1 backups won't be possible on DVD's which have been filled with extra data.

Anyone know why - or maybe it's the whole 1000 / 1024 thing and it's muddled up?

*dhc014* · 20-10-2003

Quote:

Originally posted by AbRASiON
or maybe it's the whole 1000 / 1024 thing and it's muddled up?

Yes, there you go.

AbRASiON · 20-10-2003

dhc014:

I find it kind of odd that the manufacturers would quote the smaller (more logical) size.
Traditionally they quote the biggest figure they can

- are you positive about this?

(if so, very cool, my 105 will so be sold if they come out soon)

**jsl** · 20-10-2003

It seems to be a common misconception that a dual layer DVD holds 2x the size of a single layer DVD. The true size for both a pressed dual layer DVD and dual layer DVD+R are 7.95 GB (= 8.5 x 10^9 bytes).
Check out the DVDdemystified's FAQ if you want more information:
http://www.dvddemystified.com/dvdfaq.html#3.3

**spath** · 20-10-2003

> The true size for both a pressed dual layer
> DVD and dual layer DVD+R are 7.95 GB
> (= 8.5 x 10^9 bytes). Check out the
> DVDdemystified's FAQ if you want more
> information: http://www.dvddemystified.com/dvdfaq.html#3.3

Actually to be correct a dual layer DVD contains
8.5 GB (gigabytes), ie 8.5 x 10^9 bytes. The
'gig' and 'BB' units on that page do not exist,
and although the author gives a link to the
correct definition of GB in 7.2 he apparently does
not want to use it elsewhere. Strange.

AbRASiON · 21-10-2003

Left me re-phrase all of this, sorry.

As far as I was aware a pressed DVD was at least 9gb - I could've sworn I put one in my machine and it came up as 9gb - perhaps I'm wrong.

What I want to know is if an 8.5gb dual layer DVD can burn a 1:1 image of a real pressed DVD - this will send DVD Shrink straight to bankrupcy (doesn't bother me, I'd love to make 1:1's of my favourite movies and not damage the original)

- Scott.

**spath** · 22-10-2003

> What I want to know is if an 8.5gb dual layer
> DVD can burn a 1:1 image of a real pressed DVD

Yes.

**AZImmortal** · 22-10-2003

Quote:

Originally posted by AbRASiON
this will send DVD Shrink straight to bankrupcy

dvdshrink is free to begin with.

helge · 14-12-2003

on a 1 layer dvd the physical data lenght is 400nm
on dual layer dvd the data lenght is 440nm, becouse to read the disc easyer

Alexstarfire · 15-12-2003

Lets get one thing straight first, a dual layered DVD is the same as a pressed dual layered DVD. Secondly, a DL DVD can hold 7.95 GB of data, the number seen on the DVD isn't in computer GB. I have no idea why they wouldn't put the amount it can hold in computer GB so don't ask. Go here for more information.

AbRASiON, considering what I just said it should work, but I don't know of any official burner that can burn DL DVDs at the moment. According to some other posts if you have an 8x burner there is a minor possibility that you can burn DL DVDs.

19-10-2003	#1 (permalink)
AbRASiON New on Forum Join Date: Mar 2003 Location: Melbourne, Australia Posts: 24	Dual layer recording? <a href='http://adstats.cdfreaks.com/www/delivery/ck.php?n=a13febf7&cb=INSERT_RANDOM_NUMBER_HERE' target='_blank'><img src='http://adstats.cdfreaks.com/www/delivery/avw.php?zoneid=30&cb=INSERT_RANDOM_NUMBER_HERE&n=a13febf7' border='0' alt='' /></a> Guys (and girls), In reference to this news article. http://www.cdfreaks.com/news/8135 Does anyone know why it's only 8.5gb and not 9.4 like a "normal" DVD? It's kind of disapointing because this means 1:1 backups won't be possible on DVD's which have been filled with extra data. Anyone know why - or maybe it's the whole 1000 / 1024 thing and it's muddled up?

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20-10-2003	#3 (permalink)
AbRASiON New on Forum Join Date: Mar 2003 Location: Melbourne, Australia Posts: 24	dhc014: I find it kind of odd that the manufacturers would quote the smaller (more logical) size. Traditionally they quote the biggest figure they can - are you positive about this? (if so, very cool, my 105 will so be sold if they come out soon)

20-10-2003	#4 (permalink)
jsl CD Freaks Editor Join Date: Jun 2002 Location: Sweden Posts: 510	It seems to be a common misconception that a dual layer DVD holds 2x the size of a single layer DVD. The true size for both a pressed dual layer DVD and dual layer DVD+R are 7.95 GB (= 8.5 x 10^9 bytes). Check out the DVDdemystified's FAQ if you want more information: http://www.dvddemystified.com/dvdfaq.html#3.3

20-10-2003	#5 (permalink)
spath Moderator Join Date: Jan 2002 Posts: 967	> The true size for both a pressed dual layer > DVD and dual layer DVD+R are 7.95 GB > (= 8.5 x 10^9 bytes). Check out the > DVDdemystified's FAQ if you want more > information: http://www.dvddemystified.com/dvdfaq.html#3.3 Actually to be correct a dual layer DVD contains 8.5 GB (gigabytes), ie 8.5 x 10^9 bytes. The 'gig' and 'BB' units on that page do not exist, and although the author gives a link to the correct definition of GB in 7.2 he apparently does not want to use it elsewhere. Strange.

21-10-2003	#6 (permalink)
AbRASiON New on Forum Join Date: Mar 2003 Location: Melbourne, Australia Posts: 24	Left me re-phrase all of this, sorry. As far as I was aware a pressed DVD was at least 9gb - I could've sworn I put one in my machine and it came up as 9gb - perhaps I'm wrong. What I want to know is if an 8.5gb dual layer DVD can burn a 1:1 image of a real pressed DVD - this will send DVD Shrink straight to bankrupcy (doesn't bother me, I'd love to make 1:1's of my favourite movies and not damage the original) - Scott.

22-10-2003	#7 (permalink)
spath Moderator Join Date: Jan 2002 Posts: 967	> What I want to know is if an 8.5gb dual layer > DVD can burn a 1:1 image of a real pressed DVD Yes.

14-12-2003	#9 (permalink)
helge New on Forum Join Date: Dec 2003 Posts: 1	on a 1 layer dvd the physical data lenght is 400nm on dual layer dvd the data lenght is 440nm, becouse to read the disc easyer

15-12-2003	#10 (permalink)
Alexstarfire CD Freaks Member Join Date: Feb 2003 Posts: 216	Lets get one thing straight first, a dual layered DVD is the same as a pressed dual layered DVD. Secondly, a DL DVD can hold 7.95 GB of data, the number seen on the DVD isn't in computer GB. I have no idea why they wouldn't put the amount it can hold in computer GB so don't ask. Go here for more information. AbRASiON, considering what I just said it should work, but I don't know of any official burner that can burn DL DVDs at the moment. According to some other posts if you have an 8x burner there is a minor possibility that you can burn DL DVDs.