Thomas Blume (comment 31): I can imagine following solution (systemd + util-linux): "systemd-essential": This flag would be considered as: - taboo for util-linux. Only --force would allow to umount them. - mount source for systemd "systemd-optional": This flag would be considered as: - noauto for util-linux. umount will additionally warn: "Warning: You are unmounting a volume managed by systemd. Volume will be remounted whenever device re-appears, unless you call "service foo.mount stop". - mount source for systemd Untagged entries will be ignored by systemd, except (optional) mount-a.service. I can imagine that there will be only one flag instead of upper two: "systemd" or "systemd-managed". And I can imagine that it will have argument, e. g. "systemd=var.mount".