(
Blu-ray
Disc E
Xtra
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 R
Single 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.