To power off one node in a running cluster
Make sure there are no other nodes that are in offline or re-syncing state. All disk groups must have zero offline disks and Resync = No.
If the node is a database node, stop all local database instances running on the node.
Power off the node using flashgrid-node command. It will gracefully put the corresponding failure group offline.
# flashgrid-node poweroff
After powering up the node, wait until re-synchronization completes for all disk groups before rebooting or powering off any other node.