The HP StorageWorks 4400 Scalable NAS File Services offers scalable file serving performance for medium-sized customers that cannot afford any downtime for their business-critical applications. The HP 4400 Scalable NAS File Services is a fully factory configured storage solution that includes an HP StorageWorks Enterprise Virtual Array 4400 (EVA4400) with dual array controllers and 4.8TB of storage, three high performance file serving nodes, redundant Fiber Channel switches. The HP 4400 Scalable NAS File Services does not have a single point of failure. It allows customers to transparently increase application throughput far in excess of traditional NAS products and easily grow storage capacity online without service disruption. The 4400 Scalable NAS File Services offers great total cost of ownership with a low initial price and a shared data architecture that yields lower management expenses from a single shared pool of file serving nodes and storage.At the heart of the 4400 Scalable NAS File Services is a truly symmetrical cluster file system, with high availability services and cluster storage management services, which allow file server nodes and storage to be added to linearly scale file serving throughput performance or storage capacity. The 4400 Scalable NAS File Services integrates various file serving protocols including Network File System (NFS) functionality, Common Internet File System (CIFS) or SAN-Direct I/O protocol.