You plan to install the Oracle Database 12c software. You want to use Oracle Automatic Storage Management (ASM) for storage and Oracle Restart for managing components. Oracle Grid Infrastructure for…

OSBACKUPDBA, OSDGDBA, and OSKMDBA are specific OS groups for advanced features like RMAN, Data Guard, and Key Management, respectively, and are not strictly mandatory for the core database software installation.

An operating system OSDBA group (e.g., `dba`) must be created to grant SYSDBA privilege to its members, which is essential for performing critical database administrative tasks and is a mandatory prerequisite for Oracle database installation.

For successful integration with existing Oracle Grid Infrastructure, the Oracle Database 12c software owner user must belong to the same primary operating system group as the Oracle Grid Infrastructure owner user to ensure correct permissions and management of shared components like ASM.

While it can be beneficial for organizational purposes, it is not a strict requirement for a successful installation that the Oracle Database 12c software use a separate Oracle inventory directory from an existing Grid Infrastructure installation on the same server.

An operating system OSOPER group (e.g., `oper`) must be created to grant SYSOPER privilege to its members, allowing a restricted set of database administrative tasks, and is a standard prerequisite for an Oracle database installation.