Well, it's a dual-layer disk. I know my DVD drive, both reader and writer, can read/write them as I have done that many time for data DVDs. Windows 7 natively won't recognize it.
I have several programs from InfraRecorder, Nero, ImgBurn and CloneDVD installed and nothing works from Windows 7. Here I have a BluRay reader and a Plextor writer.
I have also tried my Ubuntu Linux system which has VLC installed and it won't recognize the disk either.