# check for root-dataset of storage or any child-dataset.
# root-dataset could have 'canmount=off'. If any child is mounted
# heuristically assume that `zfs mount -a` was successful
# check for root-dataset of storage or any child-dataset.
# root-dataset could have 'canmount=off'. If any child is mounted
# heuristically assume that `zfs mount -a` was successful