Just to help add some clarity, this isn't Blu-Ray in the common consumer sense. I've seen some comments on here about the stability of the dyes and capacity.

Just to help add some clarity, this isn't Blu-Ray in the common consumer sense. I've seen some comments on here about the stability of the dyes and capacity. This technology, as mentioned at the end of the article, is Optical Archive storage [1]. The media are in the form of cartridges with 12 discs in each cartridge, and Sony claims that the media is "50 year rated". Sony currently manufactures cartridges with up to 1.5TB of storage[2]. They also make a 7U, 10-cartridge library [3]. So, in a standard rack, you could fit a maximum of 90TB of Optical Archive storage. That's admittedly not a lot given the storage density of hard drives, so I'm guessing that Facebook's decision to invest in this is partly driven by energy savings or other considerations. [1] https://en.wikipedia.org/wiki/Archival_Disc https://en.wikipedia.org/wiki/Archival_Disc [2] http://pro.sony.com/bbsc/ssr/cat-recmedia/cat-oda/ http://pro.sony.com/bbsc/ssr/cat-recmedia/cat-oda/ [3] http://pro.sony.com/bbsc/ssr/cat-datastorage/cat-opticaldiscarchive/ http://pro.sony.com/bbsc/ssr/cat-datastorage/cat-opticaldisc...