Originally posted by ohGrFreak
How much does a dual layer disc hold, if not 4.7gigsX2? I thought pressed DVDs held almost 9 gigs, what's the point of a dual layer burner, if you can't copy a single DVD?
4.7gigsX2 aka DVD10 is 4.7GB on both sides of the disc which equals 9GB combined which is stupid. a dual layer (aka double layer, aka DVD9) holds 8.5GB which is only 8GB if you use the true binary definition of a kilobyte equals 1024 bytes. hard disk and optical disc storage manufacturers use the (metric?) rule that a kilobyte equals 1000 bytes, this is a way to make it seem it holds more than it actually does.
Most movies that you can currently rent at your local video store like BlockBusters are DVD9 (8GB). You CAN make an exact 1:1 copy of most movies with recordable 8GB double layer disc. check out :
heres technical info on sony double layer recording: