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Virtualization has had a shape-shifting effect on IT infrastructures, enabling administrators to encapsulate live, running workloads in virtual machines and move them transparently across pooled resources without service interruption. Until recently, however, integration of storage area networks (SANs) and virtualization platforms was restricted to basic storage protocols, limiting the coordination and intelligent use of advanced SAN features in the virtualized environment. Lack of integration between the hypervisor and the underlying storage infrastructure has typically prevented virtualized servers from taking full advantage of the data protection, backup, and performance features of enterprise-class storage. Virtualizing and consolidating physical server and storage resources into a cooperative pool of well-integrated resources that can be dynamically applied to virtual workloads are key capabilities of VMware Infrastructure, an example of a Virtual Data Center Operating System (VDC-OS). A VDC-OS can help address the need for flexibility, speed, resiliency, and efficiency by transforming the data center into an elastic, self-managing, self-healing, shared infrastructure. Dell and VMware are further advancing these capabilities through a cooperative engineering initiative designed to integrate Dell EqualLogic PS Series Internet SCSI (iSCSI) SAN arrays and storage management technologies with VMware Infrastructure. Through this collaboration, new services based on VMware vStorage are being developed by VMware to tightly integrate advanced EqualLogic PS Series capabilities