For me, a second array would be useful for the following need: My current planned setup was: One Array with encrypted drives One cached Pool with two encrypted ssd drives in raid1 One cached Pool with two native, unencrypted ssd drives in raid1 My idea was to use the encrypted cached pool for sensitive data like stuff from a nextcloud container. That data should be written to the encrypted array at night. As long as i didn't unlocked the encrypted pool and array nextcloud isn't supposed to start up. Everything else, like nginx, homeassistant should be stored on the unencrypted cache pool and should be usable after each boot - without any manual (decrypting) interaction... The Problem: Docker isn't available as long i didn't unlocked the encrypted drive, so no container on the unencrypted pool is usable. I don't see a solution here for myself, the last idea was "What if i would be able to have a small, second unencrypted array? Would Docker be able to start up with that?"