Dual Layer DVD+R Developed

Lucretian writes "And they said it couldn't be done... It appears that Philips has found a way to burn a dual layered DVD+R. Unlike other dual layered disks that have been developed, this one is also designed to be backwards compatible with current DVD players. Phillips will be demonstrating this new technology at CEATEC this coming week at the DVD+RW alliance booth. The DVDs will hold 8.5GB of data (4 hours of video) and are set to be released as soon as next year."

Comments

Re:dual layer double sided?

[The One KEA]

Those are stamped discs, not burned discs. Stamped discs are made using a radically different process where the pits and grooves on a DVD are actually built up in layers and stamped onto the backbone of the disc (the plastic part). Stamped dual-layer DVDs have existed for some time now; Phillips is saying that they invented burnable dual-layer DVDs.

Re:dual layer double sided?

[Anonymous Coward]

Single layer discs, ~4.5G capacity, available pressed and writeable formats.
Dual layer discs, ~9G capacity, only pressed so far (this is what's new in the article).
Double sided discs, ~9G but you have to flip the disc and there is no room for a label. Available in writeable formats, but a real pain to use.
Double sided, double layer discs. ~18G capacity, rare...

Obligatory Tannenbaum Quote

[jay-be-em]

"The nice thing about standards is that there are so many of them to choose from."

Andrew S. Tannenbaum

Uh... have you seen a 8x burner in action?

[Kjella]

I haven't. Because if you're talking specs, take e.g. Pioneer DVR-107:
DVD-R: 8x (Z-CLV), 6x, 4x, 2x, 1x (CLV)
DVD+R: 8x (Z-CLV), 6x, 4x, 2.4x (CLV)

Seem awfully similar? And if you trust the editiorial comment on www.cdrlabs.com:

"Dual layer technology is something that a lot of people have been waiting for. Of course, Pioneer is also supposedly working on their own dual layer DVD-R discs. Which will make it to market first? Who knows."

I think they both won. I've got a ND-1300A DVD+/-R(W) drive. Why? A hedge, it'll burn the format no matter which wins. And I know many people that have bought the same one, which makes it more unlikely that any burner will in fact win. End result is that we end up paying money to both the certification organizations, even though there is no technological reason to have two formats.

Kjella

Re:Hard Drive is probably more reliable

[WuphonsReach]

One recommendation for the future is to make use of the PAR/PAR2 utilties. (I personally use QuickPAR v0.7)

Basically, you create 'parity' files that you store on the DVD/CD along with the source files. Then, if any of the source files become corrupted, QuickPAR should be able to reconstruct the broken bits.

The amount of redundancy is up to you... 10% is normal, 20% might be worthwhile. (So to store 4Gb with 10% redundancy, you'll need 4.4Gb of space.)