Lenovo EMC PX4-300R 12TB Network Attached Storage (70BJ9004WW) Powered by EMC storage technology and with up to 12TB of storage capacity, including a diskless option, the px4-300r Server Class comes in a space-saving 1U form factor that better, faster and more reliable for your mission critical data. The StorCenter px4-300r Server Class provides cross platform file sharing and simultaneous iSCSI block access. High performance I/O is achieved through dual GbE connections with port bonding and link aggregation capabilities.