http://fiedizheng.wordpress.com/2011/06/21/what-to-do-after-failed-11gr2-grid-infrastructure-cluster-installation/ When you installing the new 11gR2 Grid Infrastructure for RAC , you’re potentially will get a failed root.sh if the preparation was not configured properly. But don’t panic, you can do following steps to fix the issue A. Deconfigure and Reconfigure Grid Infrastructure Cluster 1. Car..