What to do after failure of Oracle 11gR2 Grid Infrastructure (CRS) Installation

In this post I will discuss about how to proceed from failure of running root.sh script as well as failure before running of root.sh in Oracle 11gR2 Grid Infrastructure (CRS) Installation. Note that, the steps described in this post is only applicable for Oracle 11gR2 Grid Infrastructure installation.

I have discussed the things into four individual sections.
1) Deconfigure and Reconfigure of 11gR2 Grid Infrastructure installation in Standalone Server
2) Deinstall of 11gR2 Grid Infrastructure installation in Standalone Server
3) Deconfigure and Reconfigure of Grid Infrastructure Cluster
4) Deinstall of Grid Infrastructure Cluster

1) Deconfigure and Reconfigure of 11gR2 Grid Infrastructure installation in Standalone Server
To deconfigure,

i) Login as root and execute "$GRID_HOME/crs/install/roothas.pl -delete -force -verbose"
$ su
#$GRID_HOME/crs/install/roothas.pl -delete -force -verbose

ii) If it fails, please disable CRS, then reboot the node.

As root, execute "$GRID_HOME/bin/crsctl disable "
$su
# crsctl disable crs
# reboot
Once the node comes backup, execute above deconfigure command again.
# $GRID_HOME/crs/install/roothas.pl -delete -force -verbose

To reconfigure,
As root, execute "$GRID_HOME/root.sh"
$ su
# $GRID_HOME/root.sh

2) Deinstall of 11gR2 Grid Infrastructure installation in Standalone Server
As Grid user, execute $GRID_HOME/deinstall/deinstall
$ $GRID_HOME/deinstall/deinstall

3) Deconfigure and Reconfigure of Grid Infrastructure Cluster
Identify of root cause of failure of root.sh by reviewing the log files. Examine the logfiles from the location $GRID_HOME/cfgtoollogs/crsconfig and $GRID_HOME/log. Once cause is identified, follow the following steps one by one.

Step 01: As root, run "$GRID_HOME/crs/install/rootcrs.pl -verbose -deconfig -force" on all nodes, except the last one. If you have two nodes cluster then only run at first node.

$su
# $GRID_HOME/crs/install/rootcrs.pl -verbose -deconfig -force

Step 02: As root, run "$GRID_HOME/crs/install/rootcrs.pl -verbose -deconfig -force -lastnode" on last node. This command will zero out OCR and VD disk also. If you have two nodes cluster then run on second node.

# $GRID_HOME/crs/install/rootcrs.pl -verbose -deconfig -force -lastnode

Step 03: Fix the problem by identified cause in the log files.

Step 04: As root, run $GRID_HOME/root.sh on first node
# $GRID_HOME/root.sh

After completion run on all other nodes except last one. At last run at last node as root user.


4) Deinstall of Grid Infrastructure Cluster

Case 1: If "root.sh" is never run on the cluster, then as grid user, execute
$ $GRID_HOME/deinstall/deinstall

Case 2: If "root.sh" already ran, then follow the step below - please keep in mind that you will need wait till each step finishes successfully before move to next one.

Step 01: As root, run "$GRID_HOME/crs/install/rootcrs.pl -verbose -deconfig -force" on all nodes, except the last one.
$ su
# $GRID_HOME/crs/install/rootcrs.pl -verbose -deconfig -force

Step 02: As root, run "$GRID_HOME/crs/install/rootcrs.pl -verbose -deconfig -force -lastnode" on last node. This command will zero out OCR and VD disk also.
# $GRID_HOME/crs/install/rootcrs.pl -verbose -deconfig -force -lastnode

Step 03: As grid user, run $GRID_HOME/deinstall/deinstall
$ $GRID_HOME/deinstall/deinstall
Related Documents
http://arjudba.blogspot.com/2010/03/cluvfy-fails-with-prvf-5436-prvf-9652.html
http://arjudba.blogspot.com/2010/03/in-11gr2-grid-rootsh-fails-with-crs.html
http://arjudba.blogspot.com/2010/03/what-to-do-after-failure-of-oracle.html
http://arjudba.blogspot.com/2009/12/enable-archive-log-mode-for-rac.html
http://arjudba.blogspot.com/2008/09/list-of-parameters-that-must-have.html
http://arjudba.blogspot.com/2008/08/oracle-rac-software-components.html
http://arjudba.blogspot.com/2008/08/oracle-clusterware-processes-on-unix.html
http://arjudba.blogspot.com/2008/08/configure-raw-devices-for-asm-in-rac.html
http://arjudba.blogspot.com/2008/08/crs-stack-fails-to-start-after-reboot.html
http://arjudba.blogspot.com/2008/08/configure-network-for-oracle-rac.html
http://arjudba.blogspot.com/2008/08/pre-installation-rac-environement-setup.html
http://arjudba.blogspot.com/2008/08/configure-server-to-install-oracle-rac.html