The storage systems support the VMware vSphere API for Array Integration (VAAI). VAAI enables the offload of specific storage operations from the VMware ESX host to the storage system for improved performance and efficiency. These APIs, available in VMware vSphere 4.1 and later, provide integration with the advanced features and capabilities of the storage systems such as thin provisioning and storage virtualization. For details, see the VMware vSphere documentation.