FeatureNEC Solutions America has shipped a fault-tolerant Linux server that it promises will remain up and running 99.999% of the time. The Express5800/320Lb boasts duplicate CPU modules that each include two Xeon MP 2.4-GHz processors. Designed for mission-critical business applications and databases, the Express5800/320lb starts at $25,499.
In Short: Always-On Linux
NEC ships fault-tolerant Linux server with 99.999% up time