Highest Availability:

  • Lockstep operation maintains memory / CPU state and system integrity protection
  • The Active Upgrade™ feature minimizes the planned downtime required to install security patches and software upgrades
  • The optional EXPRESSCLUSTER X SingleServerSafe enhances software high availability
  • Server consolidation solutions, business critical applications requiring 24/7 operations

Operational Simplicity:

  • GeminiEngine™ , an NEC-engineered LSI chipset for fault tolerance control delivers simplified hardware high availability, simple operation and easy repair without interrupting operation
  • Compatibility with existing operating systems and applications significantly reduces the complexity associated with other forms of high availability in clustering and HA/FT virtualization software solutions. It’s simple to setup, simple to use, and simple to maintain

Easy maintenance:

  • The Dual Modular Redundant (DMR) design allows easy replacement of major subsystems without shutting the system down, by supporting hot plug of modules
  • The Customer Replaceable Unit (CRU) can be replaced without any technical skills
  • Integrated EXPRESSSCOPE Engine 3 technology provides extensive remote　management capabilities regardless of the status of the server’s power or operating system

GeminiEngine™ — the Heart of Lockstep Processing

The heart of the dual-modular redundancy architecture for the FT server is its GeminiEngine™ chipset, a feature specially engineered to synchronize redundant components and prevent CPU performance degradation due to hardware redundancy control.

The GeminiEngine feature enables “lockstep” processing, allowing the redundant components to process the same instructions simultaneously, and thereby eliminating potential failure points for continuous processing.

NEC Fault Tolerant lockstep

Rapid Disk Resync (RDR)

The Rapid Disk Resync (RDR) is a disk synchronization technology that enables the disks to be resynchronized in a short period of time when their mirror has been broken due to a system failure or system maintenance.

The RDR resumes disk mirroring by performing quick copies of only data changes, rather than entire disk data, thereby minimizing the time that the system runs with non-redundant disk system.

* The RDR is available on the Windows models only.

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Download Data Sheet NEC Express5800/R320c:

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