> Hamilton didn’t talk a lot about AWS’s custom-built storage, but he did share one tidbit. The densest storage servers you can buy commercially today come from Quanta, and a rack full of them would weigh in at about three-quarters of a ton. “We have a far denser design — it is more than a ton,” Hamilton said.

Interesting. For reference; a Backblaze pod is 4U and weighs 145 pounds, so 10 of them in a standard 42U rack would be 1450 pounds = 0.715 (short) tons (or ~648kg).