My Basic Knowledge: Creating Oracle ASM instance (DBCA)

This article will talk about to create ASM through DBCA.

Creating ASM using DBCA:

Following are the steps to create ASM instance using DBCA

Launch Oracle DBCA
from several option visiable on the screen, choose 'Configure Automatic Storage Management' and hit Next.
Add SYS password to be created for new ASM instance
Oracle creates and ASM instance and a new window pops up for creating disk groups. You can choose disk group creation or finish to complete the ASM installation
The name of the new instance will be +ASM. It can be verified by logging into the ASM instance from SQL PLUS and running the below mentioned SQL

SQL> select instance_name from v$instance;

You may refer my another article if you wan to setup test ASM instance.

Manually create ASM. please refer link below

Read Detailed ASM Article