Review the following topics for information about using earlier Oracle Database releases with Oracle Grid Infrastructure 19c installations:

• General Restrictions for Using Earlier Oracle Database Releases
  You can use Oracle Database 19c, 18c, Oracle Database 12c releases 1 and 2, and Oracle Database 11g release 2 (11.2.0.3 or later) with Oracle Grid Infrastructure 19c.
• Configuring Earlier Release Oracle Database on Oracle ACFS
  Review this information to configure a 11.2 release Oracle Database on Oracle Automatic Storage Management Cluster File System (Oracle ACFS).
• Making Oracle ASM Available to Earlier Oracle Database Releases
  To use Oracle ASM with Oracle Database releases earlier than Oracle Database 12c Release 2 (12.2), you must pin all the cluster nodes.
• Using ASMCA to Administer Disk Groups for Earlier Database Releases
  Use Oracle ASM Configuration Assistant (ASMCA) to create and modify disk groups when you install earlier Oracle databases and Oracle RAC databases on Oracle Grid Infrastructure installations.
• Using the Correct LSNRCTL Commands
  To administer Oracle Database 19c local and scan listeners using the lsnrctl command, set your $ORACLE_HOME environment variable to the path for the Oracle Grid Infrastructure home (Grid home).