~~ prior running runInstaller from 11gR2 distribution, execute the following command as oracle user
$GRID_HOME/oui/bin/runInstaller -ignoreSysPrereqs -updateNodeList \
	ORACLE_HOME=/app/grid/product/19/ "CLUSTER_NODES=vortex-db01.swgalaxy,vortex-db02.swgalaxy" \
	CRS=true LOCAL_NODE=vortex-db01.swgalaxy