Thanks Jorge. The use case is keeping the luks header separate from the drive encrypted by luks. When using luksFormat you can write the header to disk rather than having the header file at the front of the device being encrypted. If the only thing keeping holding this back is the use of a parity drive, you can relax that assumption. I'm going to be rolling a snapshot parity (through a third party) as it suits my dataset better than unraid's real time parity. I was doing research on how to interact with unraid via the CLI. I see you can start the array but couldn't find much more functionality than that.