# scswitch -S -h phys-schost-1
# shutdown -g0 -y -i0
May 2 10:08:46 phys-schost-1 cl_runtime: WARNING: CMM monitoring disabled.phys-schost-1# 
INIT: New run level: 0
The system is coming down.  Please wait.
Notice: rgmd is being stopped.
Notice: rpc.pmfd is being stopped.
Notice: rpc.fed is being stopped.
umount: /global/.devices/node@1 busy
umount: /global/phys-schost-1 busy
The system is down.
syncing file systems... done
Program terminated
ok