Looks like this is what Microsoft uses to provide their competing product to AWS Glacier Deep Archive.<p>Pretty interesting. When AWS launched Glacier, people assumed tape, but that doesn't seem to quite add up relative to the characteristics of the product, and AWS has never said a word on the technology it uses. Then someone came out and started claiming they were using BDXLs, as I recall. Have to say, I did not conceive of "invent your own optical storage media" as a possibility.<p>My guess is Microsoft made this information public because AWS is doing something similar and they're the second-mover rather than the first-mover. But that's just my guess.<p>Video: <a href="https://www.youtube.com/watch?v=3RKpA1OiEFE">https://www.youtube.com/watch?v=3RKpA1OiEFE</a><p>Also interesting to note how this demonstrates there is a ton of unharnessed potential to optical recording that isn't available in a product available to the general public. In fact, it seems quite telling that every increase in optical media storage capacity available to the public has coincided with a new video format (e.g. 128GB BDXLs for UHD Blu-ray). Since physical medium-based video distribution is dying, that doesn't bode well for the continued availability of optical media archival solutions that can keep up with contemporary capacities...