Tasks to complete Oracle installation in a VCS cluster depend on whether you want the $ORACLE_HOME on shared disk or local disk.
See Installation tasks for $ORACLE_HOME on shared disks.
See Installation tasks for $ORACLE_HOME on local disks.
For ASM, you must install $ORACLE_HOME on local disks and configure the Oracle ASM.
Figure: Comparison of the installation flow illustrates the flow of the installation when the $ORACLE_HOME is on shared disk and on local disk.