If your pool is layed out in a beadm compatible way you can use beadm. Otherwise just snapshot your root dataset recursively and rollback the whole pool in the

If your pool is layed out in a beadm compatible way you can use beadm. Otherwise just snapshot your root dataset recursively and rollback the whole pool in the unlikely case that the update fails. Once the upgrade succeeded (including the new boot blocks) you can upgrade your pool by enabling the latest feature flags.