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18 Appendix E
DVD Standards and Formats
At this time, there are different DVD standards and formats:
DVD-ROM, DVD-RAM, DVD-R, DVD RW (DVD-RW,
DVD+RW)
DVD-ROM
ROM = Read Only Memory
DVD-ROM media are read only media. DVD-ROM is the
successor of CD-ROM.
DVD-ROM media have a 120mm diameter (80mm diameter
mini DVD) and look like CD-ROMs.
DVD-ROM media can be read in all DVD drives.
It is used for games, music, films und programs. The biggest
advantage compared to the standard CD ROM is the larger
capacity:
4.7 GB as Single-Layer DVD (DVD-5) and
8.5 GB as Dual-Layer DVD (DVD-9)
DVD-RAM
RAM = Random Access Memory
DVD-RAM media can be written and deleted in a compatible
DVD drive. That makes it possible to use a DVD-RAM drive
like an additional hard disk to expand your systems` storage
capacity. DVD-RAM Disks are available as single sided disks
with 2.6 GB and 4.7 GB, or double sided as 5.2 GB and 9.4
GB. Type 1 media are delivered in a cartridge which can not
be opened. Typ2 (single side) and Typ4 (dual side) media are
delivered in a cartridge which can be opened to take out the
disc. This is useful, if you want to playback the media in a
DVD-ROM drive. BUT: Only a few DVD-ROM drives are able
to play DVD-RAM media due to compatibility! DVD RAM
media delivered without cartridge are called “Bare-Media”.
DVD-R
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