ORA-19565:BACKUP_TAPE_IO_SLAVES not enabled when duplexing to sequential devices Cause: An attempt was made to specify duplexing to sequentialdevices, but the
BACKUP_TAPE_IO_SLAVES initialization parameter was not enabled. Action: SpecifyBACKUP_TAPE_IO_SLAVES=TRUE in the INIT.ORA file, or do
not specify duplexing to sequential devices.