root@truenas[~]# zfs get mountpoint zpoolbak
NAME      PROPERTY    VALUE          SOURCE
zpoolbak  mountpoint  /mnt/zpoolbak  default
root@truenas[~]# zfs get mountpoint jailpool
NAME      PROPERTY    VALUE          SOURCE
jailpool  mountpoint  /mnt/jailpool  default
root@truenas[~]# zfs get canmount zpoolbak
NAME      PROPERTY  VALUE     SOURCE
zpoolbak  canmount  on        default
root@truenas[~]# zfs get canmount jailpool
NAME      PROPERTY  VALUE     SOURCE
jailpool  canmount  on        default
root@truenas[~]# zfs get canmount zpoolbak/PhotoLibrary
NAME                   PROPERTY  VALUE     SOURCE
zpoolbak/PhotoLibrary  canmount  on        default
root@truenas[~]# zfs get mountpoint zpoolbak/PhotoLibrary
NAME                   PROPERTY    VALUE                       SOURCE
zpoolbak/PhotoLibrary  mountpoint  /mnt/zpoolbak/PhotoLibrary  default
root@truenas[~]#