zpool list
returns:
NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
Pool1 43.5T 35.6T 7.94T - - 10% 81% 1.00x ONLINE /mnt
freenas-boot 216G 5.08G 211G - - 0% 2% 1.00x ONLINE -