Home > Workload Solutions > SAP > Guides > SAP HANA TDI Guides > Dell Validated Design for SAP HANA TDI with Dell PowerMax 2500 and 8500 Storage Arrays > SAP HANA deployment models
The SAP HANA platform uses SAP software components that are optimized on proven, SAP partner-provided hardware. Two models are available for on-premises deployment, as shown in the following figure, the appliance model and the TDI model:
An SAP HANA appliance includes integrated storage, compute, and network components by default. The appliance is certified by SAP, built by an SAP HANA hardware partner, and shipped to customers with all its software components preinstalled.
The SAP HANA appliance model presents certain limitations for customers:
The SAP HANA servers in a TDI model must be certified by SAP and meet the SAP HANA requirements. The network and storage components, including arrays, can be shared in customer environments. Customers can integrate SAP HANA seamlessly into existing data center operations such as disaster recovery (DR), data protection, monitoring, and management, reducing the time-to-value, costs, and risk of an overall SAP HANA adoption. For more information, see the following SAP documents: