You can extend your Oracle Exadata Rack by adding another rack and configuring the racks together.

• Overview of Adding Another Rack to an Existing System
  Review the following notes before cabling racks together.
• Cabling Two Racks Together
  Choose from the available methods based on your system specifications and operational requirements.
• Cabling Several Racks Together
  By using the following procedures, you can add another rack to an existing multi-rack system.