Optical Disc Archive

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Optical Disc Archive

Media type	Optical disc
Encoding	WORM (write once)
Capacity	300GB~5.5 TB (per cartridge)
Write mechanism	Optical Blu-ray Laser (405nm)
Standard	UDF (Universal Disc Format)
Developed by	Sony Corporation
Manufactured by	Sony, TDK, Panasonic
Usage	Digital Data Archival (50~100+ Years)
Released	2012

Optical Disc Archive (ODA) is part of Sony's proprietary PetaSite data archival library system.

The Sony PetaSite (Sony CSM-60/100/200 units) was based on SAIT2 & LTO2 linear tape drives, in partnership with IBM from 1998~2012, when it was phased out for optical based media.

Marketed as a longer life and more durable competitor to the popular tape based Linear Open Tape (LTO) storage systems using a similar removable cartridge system, where each cartridge holds 12 optical discs, or 6,420 discs per 42U rack, the first generation were single sided discs and re-writable up to 1.5 TB using Sony's well known Professional Disc used in XDCAM cameras and on-site archival.

The generation 3 version of the cartridge, using the Sony, Panasonic jointly developed archival discs (AD) each cartridge has a total capacity of 5.5 TB. This uses 11 optical discs, 3 layers on each side, at 500 GB per disc,^[1] with next generation planned to reach 1 TB a disc or 12 TB a cartridge.^[2]

Each of the internal optical discs is similar to, but not directly compatible with, Blu-ray or Blu-Ray-BDXL systems.