If necessary, you can completely remove all Oracle databases, instances, and software from an Oracle Real Application Clusters (Oracle RAC) Oracle home directory.

Topics:

• Overview of Deinstallation Procedures
  There are several tasks to perform when completely removing all Oracle databases, instances, and software from an Oracle home directory.
• Identifying All Instances On a Cluster
  You can identify the database instances on your cluster using either SRVCTL or the Windows Services control interface.
• Removing Oracle RAC Software
  The deinstallation tool removes Oracle Clusterware and Oracle Automatic Storage Management (Oracle ASM) from your server, and Oracle Database installations, for both Oracle RAC and single-instance databases.
• Cleaning Up After a Failed Installation
  If an installation fails, then you must remove the Oracle home directory and remove all files that Oracle Universal Installer (OUI) created during the attempted installation.