HP StorageWorks Cluster Extension EVA software is an integrated solution that provides protection against system downtime with automatic failover of application services and read/write enabling of remotely mirrored mid-range storage over metropolitan distances. Cluster Extension EVA adapts in real time, to real life situations, providing protection via rapid site recovery. Cluster Extension EVA delivers true hands-free failover/failback decision making - in the event human storage administrator is unaware of the outage, unable to respond or not present – because Cluster Extension EVA requires no server reboots or LUN presentation/mapping changes during failover. Cluster Extension EVA integration provides efficiency that preserves operations and delivers investment protection as it monitors and recovers disk pair synchronisation on an application level and offloads data replication tasks from the host.