Mind the encryptionroot: How to save your data when ZFS loses its mind

While ZFS has a well-earned reputation for data integrity and reliability, OpenZFS native encryption has some incredibly sharp edges that will cut you if you don't know where to be careful. Unfortunately, I learned this the hard way, standing in a pool of my own blood and tears after thoroughly lacerating myself. I very nearly permanently lost 8.5 TiB of data after performing what should've been a…