zpool create 'NAS' '/dev/ada1'
zpool status 'NAS'

Clone Mount/Rsync

pkg install fusefs-ext2 rsync
mkdir -p '/mnt/NAS2' && mount -t 'ext2fs' -o 'rw' '/dev/ada2p1' '/mnt/NAS2'
rsync --verbose --recursive --update --ignore-existing --progress '/mnt/NAS2/' '/NAS/'