I wish these block storage services gave you some idea of failure rate/durability and availability. Amazon publishes some rough volume loss rates but not even Google tells you what kind of durability to expect out of a persistent volume. They all say they are tri-replicated, which semi-implies highly durable storage. What about availability?

Lastly, I'd love to know if DO/Linode have custom rolled their solution or are using Ceph or something similar. Not that I don't trust them, but they aren't recruiting the same engineers as Google.