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