The doc says "This subcommand will fail if any connected daemon or client is not compatible with the features offered by the given <version>". The command could be done if the client is disconnected, I guess. <luuvuong91@xxxxxxxxx> 于2020年5月14日周四 下午4:50写道: > HI > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx