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DVD9 is a single-sided dual-layer format DVD disc capable of storing up to 7.95GB of data.

As data is stored within two separate layers, this may cause a noticable pause during playback as the DVD player refocuses the laser to read the second layer.

The main DVD formats currently in use are:

  • DVD5 (single-sided single-layer)
  • DVD9 (single-sided dual-layer)
  • DVD10 (two-sided single-layer)
  • DVD14 (two-sided single/dual-layer)
  • DVD18 (two-sided dual-layer)