https://ubuntu.com/tutorials/setup-zfs-storage-pool
https://4te.me/post/zfs-ubuntu/
https://www.freebsd.org/doc/handbook/zfs-zpool.html

multiple partitions
https://superuser.com/questions/1199316/zfs-on-multiple-partitions-on-one-disk
https://superuser.com/questions/488662/can-two-seperate-zpools-exist-on-the-same-physical-devices/488793