ORA-15471
        volume redundancy incompatible with disk group redundancy
        
        
        Cause
        An ADD VOLUME command specified a volume redundancy that was incompatible with the redundancy of the disk group.
        Action
        Specify a valid volume redundancy. The following restrictions apply:
- An unprotected redundancy volume cannot be added to a normal or high redundancy disk group.
- A mirror or high redundancy volume cannot be added to an external redundancy disk group.
- A mirror volume cannot be added to a high redundancy disk group.
        
     
    
    
        ORA-15471
        volume redundancy incompatible with disk group redundancy
        
        
        Cause
        An ADD VOLUME command specified a volume redundancy that was incompatible with the redundancy of the disk group.
        Action
        Specify a valid volume redundancy. The following restrictions apply:
- An unprotected redundancy volume cannot be added to a normal or high redundancy disk group.
- A mirror or high redundancy volume cannot be added to an external redundancy disk group.
- A mirror volume cannot be added to a high redundancy disk group.
        
     
    
    
        ORA-15471
        volume redundancy incompatible with disk group redundancy
        
        
        Cause
        An ADD VOLUME command specified a volume redundancy that was incompatible with the redundancy of the disk group.
        Action
        Specify a valid volume redundancy. The following restrictions apply:
- An unprotected redundancy volume cannot be added to a normal or high redundancy disk group.
- A mirror or high redundancy volume cannot be added to an external redundancy disk group.
- A mirror volume cannot be added to a high redundancy disk group.