==== ZFS Tips & Tricks ====
  * https://jrs-s.net/2018/08/17/zfs-tuning-cheat-sheet/
    * zpool create -o ashift=12 -f rpool mirror /dev/sdc3 /dev/sdd3
    * zfs set compression=lz4 rpool
    * zfs set recordsize=64K rpool
    * zfs set atime=off rpool