Different sizes when copying UHD Triple-layer discs

Discussion in 'AnyDVD HD (UHD only)' started by pjouy, Jun 17, 2020.

  1. pjouy

    pjouy Translator (fr)

    Hi everyone,

    I was wondering why there was such big différences between UHD Triple-layer discs and their copies to hard disc (made by Windows' copy or AnyDVD, it's the same). Screenshots attached (image 1 & 2.jpg).
    Difference goes from ~400MB to up to 7 GB, depending of discs.
    Those numbers are exactly the same between Windows' Explorer copy feature and AnyDVD rip one.


    Image1.jpg Image2.jpg




    I did not see such different sizes with Dual-layer discs (image3.jpg)
    Image3.jpg

    As far as I can tell, all (decrypted) ripped discs play fine.

    Any idea?
     
    Last edited: Jun 18, 2020
  2. James

    James Redfox Development Team Staff Member

    Lead in / lead out / space around the layer breaks.
    Try to rip to image.
     
  3. pjouy

    pjouy Translator (fr)

    I have almost the same difference when comparing Ripped to ISO file with the extracted ISO.
    Image4.jpg
     
  4. James

    James Redfox Development Team Staff Member

    Yes.
     
  5. pjouy

    pjouy Translator (fr)

    So there are zero'd parts just to fill the disc on triple-layer disc and not double-layer?
     
  6. James

    James Redfox Development Team Staff Member

    Yes, and mirrors of the partition / directory structure / file sector locations.
     
  7. pjouy

    pjouy Translator (fr)

    Hmm, it's interresting, thanks for those infos James (y)
    On another TL disc, there is "only" 400MB difference, not 7GB. That's wired (or less space available for mirrors and zeros).

    Is it related to that triple-layer discs are less reliable (and also more difficult to load for "friendly" drives)?