9.7.3.1 Create a New Test Master - Full Clone on a Disk Group with ASM ACL Enabled
You can create a full clone of your database using RMAN backup/restore, data pump, or any of the other methods typically used to create a full clone of a database.
You should place the clone in a regular (non-sparse) Oracle ASM disk group.
After creating the full clone, make the data files read-only to help prevent accidental overwrite.
For example:
SQL> ALTER DISKGROUP DATA SET PERMISSON OWNER=READ ONLY, GROUP=READ ONLY, OTHER=NONE FOR FILE 'FILENAME';
Parent topic: Setting Up the Test Master