The Sun Fire E4900 server is a high-performance, highly available midrange data center server most suited for mission-critical data center environments. Scaling up to 12 UltraSPARC IV processors with chip multithreading technology executing 24 simultaneous computing threads, this server is ideal for large departmental databases, decision-support, customer relationship management, and high-performance technical computing applications that require maximum performance and availability. High availability is delivered with Full Hardware Redundancy, fault-isolated Dynamic System Domains, and Dynamic Reconfiguration for hot swapping key server components while applications are up and running. Investments are protected with the ability to mix and manage UltraSPARC IV and UltraSPARC III processors - running at their rated speed - in the same system. This server comes remote-services ready for preemptive support and preloaded with a rich set of applications with the Java Enterprise System. This server is available in the Sun Customer Ready Systems (CRS) program for factory integration into ready-to-deploy, customer-specific solutions.