Ultra Density Optical

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The Ultra Density Optical ( UDO ) was developed by the British manufacturer Plasmon as the successor to MOD for professional corporate use. Technically, UDO is based on phase change technology and has a storage capacity of 30 GB (gigabytes), UDO2.0 is specified with 60 GB (GBytes) and was presented at CeBIT 2007 in Hanover. Since September 2004, the UDO has been based on the cross-manufacturer standard ISO / IEC 17345. Since the bankruptcy of Plasmon in 2008, Mitsubishi (Japan) has been the only remaining manufacturer, with some of the disks being relabeled and sold under different brand names (Plasmon, IBM, Maxoptix) become. The UDO supporters are organized in the UDO Technology Forum industrial association.

Specification of the media

The UDO medium is in a cartridge in 5-1 / 4 "format so that it can be used in existing jukeboxes (or optical libraries) of the same medium format (5-1 / 4" MOD). To do this, however, UDO drives must be installed in the jukeboxes. MOD and UDO are not compatible.

The UDO is offered in three media variants for electronic archiving :

  • True-Write-Once means writable and not erasable
  • Compliance-Write-Once can be written once, but has a scratch function for targeted data deletion
  • Rewritable means rewritable up to 10,000 times

The data integrity of the data stored on the media is certified for 50 years.

Norms and standards

  • ISO / IEC 17345, based on the ECMA-350 standard .

literature

  • Gieselmann, Hartmut: Blue memory. Professional data backup of the next generation in: c't, ISSN  0724-8679 , 21st year (2004), issue 6, pages 196ff., Also available online for a fee . This article covers UDO and PDD and also shows relevant differences to MOD and DVD-RAM.
  • Gieselmann, Hartmut: Blue Giants. Professional storage drives with blue laser in: c't, ISSN  0724-8679 , 22nd year (2005), issue 11, page 90, also available online for a fee . This article covers a practical comparison test with the UDO30D drives and the PDD competitor BW-RU101 and their media.

Web links