Amazon’s Glacier secret: BDXL (2014)
Nice investigation and also Facebook has been using 50gb blue rays <a href="http://www.businessinsider.com/facebook-uses-10000-blu-rays-for-backup-2014-1" rel="nofollow">http://www.businessinsider.com/facebook-uses-10000-blu-rays-...</a> and is moving to 300gb 
 <a href="http://www.businessinsider.com/ces-2016-facebook-uses-panasonic-freezeray-2016-1" rel="nofollow">http://www.businessinsider.com/ces-2016-facebook-uses-panaso...</a> .