NEC Express 5800 User Manual page 106

Hardware
Below shows the samples of redundant configuration.
1) N+1 redundant configuration
N+1 Redundant
N=1 2 PSUs
N=2 3 PSUs
N=3 4 PSUs
PSU: Power Supply Unit
*1 : Operation can be continued even if PSU1 fails or Power Supply1 has outage.
Operation can be continued even if PSU3 fails or Power Supply2 has outage.
*2 : Operation can be continued even if PSU1 fails, PSU2 fails,PSU3 fails or Power Supply2 has
outage.
*3 : Operation can be continued even if PSU1 fails, PSU2 fails,PSU3 fails or PSU4 fails.
2) 2N redundant configuration
2N Redundant
N=1 2 PSUs
N=2 4 PSUs
*4: Operation can be continued even if PSU1 fails or Power Supply1 has outage.
Operation can be continued even if PSU3 fails or Power Supply2 has outage.
*5 : Operation can be continued even if PSU1 fails,PSU2 fails or Power Supply1 has outage.
Operation can be continued even if PSU3 fails,PSU4 fails or Power Supply2 has outage.
Power Supply 1
PSU1 PSU2
Used
Used Used
Used Used
Power Supply 1
PSU1 PSU2
Used
Used Used
106
Power Supply 2
PSU3 PSU4
Used
Used
Used Used
Power Supply 2
PSU3 PSU4
Used
Used Used
Note
*1
*2
*3
Note
*4
*5