NEC 5800/320LB
DUAL MODULAR REDUNDANCY

High Density "Dual Modular" Architecture
The Dual Modular Redundant(DMR) design of the Express5800/320Lb allows easy replacement of major subsystems without interruption of processing. Subsystem modules are referred to as Customer Replaceable Units (CRU's), can be configured, diagnosed and hot-swapped in case of failure. Indicator lights alert IT staff of the status of the module and confirm successful replacement of hardware components.

Modularity
The unique dual-modular hardware architecture is comprised of redundant subsystems executing all processing in lockstep to virtually eliminate any single point of failure and safeguard data-integrity. These CPU subsystems perform the same instructions at the same time, with instantaneous failover to the redundant subsystem in the event of hardware failure. If a mismatch occurs, the system isolates the faulty subsystem and instantly fails over to the other subsystem without memory data loss or application interruption. Servicing the system is as simple as replacing the faulty module while the server remains on-line. There is no interruption in processing, no data loss and no performance impact. The 320Lb provides a hardware fault tolerant, 5-9's environment for Windows® applications.