HP Left Hand P4000 Virtual SAN Appliance Software (VSA) Â- Gain the benefits of a fully-featured SAN without dedicated external storage. Most virtualized server environments require shared storage for high availability, as well as application data, & storage solutions should be as highly available as the VMs. With a comprehensive feature set, Left Hand VSA is optimized for virtual environments & is a flexible shared storage solution that scales as needed. The ability to use existing server, DAS & SAN hardware within your environment greatly increases storage utilization, & reduces costs associated with dedicated external storage. Built-in high availability & disaster recovery features enhance server virtualization capabilities to deliver better business continuity. Straightforward & simple administration is provided by a management console that allows the administrator to manage all Left Hand SAN nodes, physical & virtual, regardless of their physical location.