Comprobar servicio activo:
  netstat -an | grep 7777

Desmontar recurso compartido:
  umount /opt/services/shared

Parar servicios por orden
  /etc/init.d/o2cb status
  /etc/init.d/o2cb offline
  /etc/init.d/o2cb unload

Comprobar está parado
  # /etc/init.d/o2cb status

  Module "configfs": Not loaded
  Filesystem "configfs": Not mounted
  Module "ocfs2_nodemanager": Not loaded
  Module "ocfs2_dlm": Not loaded
  Module "ocfs2_dlmfs": Not loaded
  Filesystem "ocfs2_dlmfs": Not mounted

Volver a cargar:
  /etc/init.d/o2cb load
  /etc/init.d/o2cb online
  /etc/init.d/o2cb status

  Module "configfs": Loaded
  Filesystem "configfs": Mounted
  Module "ocfs2_nodemanager": Loaded
  Module "ocfs2_dlm": Loaded
  Module "ocfs2_dlmfs": Loaded
  Filesystem "ocfs2_dlmfs": Mounted
  Checking O2CB cluster ocfs2wli: Online
   Heartbeat dead threshold: 60
   Network idle timeout: 60000
   Network keepalive delay: 2000
   Network reconnect delay: 2000
  Checking O2CB heartbeat: Not active

Volver a montar
  mount -a