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(Blu-ray Disc EXtra Large) High-capacity Blu-ray formats designed for professional broadcasting and archival uses. Using three and four layers, BDXL media have more than five times the capacity of the first Blu-ray discs (see below).

BDXL drives may or may not read the earlier formats, but regular Blu-ray drives absolutely do not support BDXL. See Blu-ray.

 ---Modes --Layers        GB  Hours  ROM   RE   RSingle        25  4.5    X    X    X
  Dual          50    9    X    X    X
  Triple BDXL  100   18         X    X
  Quad BDXL    128   23              X

    ROM = Read Only (pressed movie disc)RE = REwritable  R = Recordable (write once)

Blu-ray Cartridge (1.5TB)
For archival storage, this Sony optical system records onto quad-layer BDXL discs one time only. The plastic unit (top) is a demo cartridge, showing all 12 discs inside.
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References in periodicals archive ?
Paul Brockbank, CEO, Millenniata commented, This is a very exciting time for us as we now have product offerings that cater to all market sectors from consumer to enterprise with our DVD, Blu-ray, and now BDXL media.
So, the introduction of the BDXL media opens the door to greater creativity and development across all content creation, especially in the field of filmmaking.
BDXL, released by the Blu-ray Disc Association (BDA) in June 2010, is a multi-layer recordable Blu-ray format with up to 128GB of capacity.
The BDXL specification, which is targeted primarily at commercial segments such as broadcasting, medical and document imaging enterprises with significant archiving needs, will provide customers with write-once options on 100GB and 128GB capacity discs and rewritable capability on 100GB discs.
For comparison, 128GBs of data on a single quad layer BDXL disc is the equivalent of 27 standard DVDs or five single layer Blu-ray discs.
Blu-ray, Blu-ray Disc, and BDXL are trademarks of the Blu-ray Disc Association.