De-Installing Oracle Real Application Clusters Software and Database
Step 1:- Examine the Oratab file (/var/opt/oracle/oratab in
Solaris) to identify the instance dependencies on this oracle home.
Step 2:- Start DBCA, selects Oracle Real
Application Clusters Database, select Delete a database, and selects the
database that you want to delete. Repeat this step to delete all databases.
Steps 3 connect with ASM instance, run the following command:
a) Check disk group which are using by ASM instance:
select * from V$ASM_DISKGROUP;
b) Drop the disk group.
drop diskgroup
c) Shut down ASM on all RAC nodes, and verify that all ASM instances are
stopped.
e) To remove the ASM entry from the OCR, run the following command for all
nodes on which this Oracle home exists:
srvctl remove asm -n nodename
Step 4 Remove oracle home
(On All Node)
Go to
$ORACLE_HOME/oui/bin and execute ./runInstaller. Start OUI, and remove any
existing Oracle Database 10g with RAC software by selecting Deinstall
Products and selecting the Oracle home that you want to remove.
Step 5 Remove
oratab entries for the deleted Oracle home databases. Step 6 De-Installing Oracle
Clusterware
a) Go to
$CRS_HOME/install directory and execute rootdelete.sh script (On All node)
#
/export/home/oracle/product/10.2.0/crs/install/rootdelete.sh
This
will disable the Oracle Clusterware applications that are running on the
cluster node.
b)
Run the script CRS_home
/install/rootdeinstall.sh on a local node toremove the OCR.
c) Go to $CRS_HOME/oui/bin and execute.
/runInstaller. Start OUI. In the Welcome page, click Deinstall
Products to display the list of installed products. Select the Oracle
Clusterware home to de-install (Execute on All Node)
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