There are certain situations in which you might be required to remove Oracle software.
Remove installed components in the following situations:
You have successfully installed Oracle Clusterware, and you want to remove the Oracle Clusterware installation, either in an educational environment, or a test environment.
You have encountered errors during or after installing or upgrading Oracle Clusterware, and you want to reattempt an installation.
Your installation or upgrade stopped because of a hardware or operating system failure.
You are advised by Oracle Support to reinstall Oracle Clusterware.