The IBM System Storage SAN Volume Controller Storage Engine (2145 Model 8G4) is the hardware component of the IBM System Storage SAN Volume Controller. The components of the SAN Volume Controller (SVC) include highly specialized software, storage engines installed in pairs, a master console, and power connection equipment.The SAN Volume Controller's storage engine is designed to provide substantially improved performance and scalability for diverse workloads. Other enhancements include the redundant AC power feature to support dual power inputs to the SVC storage engine.