Editing DVD-RAM (section)

=== Recording speeds ===
Since the Internationale Funkausstellung Berlin 2003 the specification is being marketed by the ''RAM Promotion Group'' (RAMPRG), built by [[Hitachi, Ltd.|Hitachi]], [[Toshiba]], [[Maxell]], [[LG Electronics]], [[Panasonic Corporation|Matsushita/Panasonic]], [[Samsung]], [[Lite-On]] and [[Teac]]. The specification distinguishes between:

* DVD-RAM version 1.0 (1997), recording speed 1x<br>– Defines discs with capacity of 2.58&nbsp;GB per side (24 track zones) (see also: [[DVD#Capacity|DVD Capacity]])
* DVD-RAM version 2.0 (1999), recording speed 2x<br>– Defines discs with more common capacity of 4.7&nbsp;GB per side (35 track zones)
* DVD-RAM version 2.1 (2000)<br>– Introduces 8-cm discs with capacity of 1.46&nbsp;GB per side (14 track zones){{sfn|Taylor|2001|pp=148, 228}}<ref name="Supplementary"/>
* DVD-RAM version 2.2 (2004) divides drives and discs into two classes due to breaking compatibility:<ref name="Supplementary"/><ref name=DvdForumNotice/><br> – Class 0, recording speed 2x/3x/5x<br> – Class 1, recording speed 6x/8x/12x/16x (DVD-RAM2)

Speeds more than 2x are defined by Optional Specifications (Nx-speed DVD-RAM):<ref name="Supplementary"/><ref>{{cite web |url=https://www.dvdfllc.co.jp/pdf/bookcon2009-02rev.pdf |title=DVD Book Construction |website=DVD FLLC |access-date=2019-12-16}}</ref>
* Rev. 1.0 (2002) - 3x-speed
* Rev. 2.0 (2004) - 5x-speed
* Rev. 3.0 (2005) - 6x-speed
* Rev. 4.0 (2005) - 8x-speed
* Rev. 5.0 (2005) - 12x-speed
* Rev. 6.0 (2005) - 16x-speed (never released)