Hi, May I try to answer here... two points to consider 1. Space used for Dsource. I assume that Exadata does not presents EXADATA Luns for Delphix Purpose, In other words you have probably declared some LUNs from SAN to the host running Delphix. Note: Using Exadata storage cells for Dsource does not make sense. The Dsource is there only for one purpose: Be in sync with your Oracle Instance linked to your Dsource transferring oracle data block using RMAN API. 2. Exadata space available thru ASM. This storage will be used by VDBs only if the target environment you choose for your VDB is hosted by an exadata ORACLE_HOME. Best regards, Den.