NEC Express5800 Series User Manual page 34

2-4 General Description
NEC Express5800/320Fc series mainly provides the following advantages:
Fault-tolerant processing and I/O subsystems
NEC Express5800/320Fc series use redundant hardware and software to assure server
operation even if one module encounters problems with its processors, memory, I/O
(including trouble related to the I/O controller), disk drives, or Ethernet adapter.
Continuous network connection
NEC Express5800/320Fc series maintains continuous network connection by detecting
trouble with the network adapters, connections, etc. If trouble occurs, the standby network
connection will take over all network traffic processing and maintaining the network
system connection of NEC Express5800/320Fc series without losing network traffic or
client connection.
Support of multiple network connections
Since NEC Express5800/320Fc series can support multiple Ethernet connections, you can
add network redundant control or network traffic control.
Industry standard hardware platform
NEC Express5800/320Fc series uses IA (Intel Architecture)-based system hardware.
No need to modify applications
You can run Windows Server 2003-compliant applications on NEC Express5800/320Fc
series. Thus, unlike other fault-tolerant products, special API or scripts are not necessary.
Automatic mirroring
NEC Express5800/320Fc series automatically maintains data as the current data.
Automatic detection and notification of faults
NEC Express5800/320Fc series detects and sorts out all events such as general status
changes and faults, and notifies Windows Event Log of these events.
Transparent migration
NEC Express5800/320Fc series constantly monitors events. If trouble occurs on NEC
Express5800/320Fc series' server module, it will transparently use a redundant module
of the failed module. This feature maintains data and user access without losing
application service.
Automatic reconfiguration
When the failed module restarts after the trouble is corrected, NEC Express5800/320Fc
series will perform reconfiguration automatically, and if necessary, resynchronize the
affected modules. Reconfiguration can include CPU processing (e.g., CPU memory),
server's operating system (and related applications), and system data stored on the hard
disks. In most cases, NEC Express5800/320Fc series automatically restores redundancy
of the server modules after recovery.