Hello,

I'm having difficulty finding this information, so hopefully someone here can help me out:

1. I've read that a DVD+R DL's 8.5GB capacity is "fully equal" to commerical DVD-Video DL discs. Is this true?

2. When people say "8.5 GB," do they mean 8.5 billion bytes, or 8.5 * 2^30 bytes? Is it even exactly 8.5, or is that a rounded figure?

3. Exactly how much user data does each layer of a +R DL disc store? (Is the capacity split evenly between them, or can one layer hold more than the other?)

4. I've read that there are complications with custom layer breaks on +R DL discs that don't necessarily exist for DVD-Video DL discs. Namely, the layer break on a +R DL has to be at the halfway point of the data. Is this true? If so, does this cause problems when trying to copy DVD-Video DL discs?

5. Are there any other caveats related to +R DLs that I haven't even considered?

6. Are the answers to these questions different at all for -R DL discs?

Thank you,

-Don