In some cases, it may be desirable to restart all cluster nodes simultaneously instead of rebooting them one by one.
Note: Do not reboot all nodes simultaneously using reboot or flashgrid-node reboot command. This may lead to CRS failure to start if one node goes down when CRS is already starting on another node.
To restart the entire cluster
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Stop all running databases.
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Stop Oracle cluster services on all nodes.
# crsctl stop cluster -all -
Power all nodes off.
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Start all nodes