Optical Disc Archive
Optical Disc Archive (ODA) is part of Sony's proprietary PetaSite data archival library system.
| 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 |
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 1.5TB 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 5.5TB. This uses 11 optical discs, 3 layers on each side, at 500GB per disc, with next generation planned to reach 1TB a disc or 12TB a cartridge.
Each of the internal optical discs is similar to, but not directly compatible with, Blu-ray or Blu-Ray-BDXL systems.