# get readonly property
zfs get all | grep readonly
# deactivate readonly
zfs set readonly=off rpool/dataset
# activate readonly
zfs set readonly=on rpool/dataset
# get readonly property
zfs get all | grep readonly
# deactivate readonly
zfs set readonly=off rpool/dataset
# activate readonly
zfs set readonly=on rpool/dataset
Thank you. Did the trick for me. I needed to reset the inheritance for sub-datasets using “zfs inherit -r readonly “