Operation Guide

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IMPORTANT:
 The N8405-023 PSU works only in [N+N redundant mode]. Be sure
to specify [N+N redundant mode] before using the N8405-023 PSU.
 Specify "maintain redundancy" or "recover redundancy" mode for
the N8405-039 PSU. Under this condition, "N+1 redundant mode"
is recommended.
 Do not use power units of different types in the same Blade
Enclosure.
 Power Control Policy:
Specify the power control policy of the EM card.
The power control policy includes three modes: CPU performance, "maintain
redundancy," and "recover redundancy."
The default setting is the CPU performance mode.
IMPORTANT: Specify "maintain redundancy" or "recover
redundancy" mode for the N8405-039 PSU. Under this condition, "N+1
redundant mode" is recommended.
– CPU performance mode
The CPU performance mode makes the EM card prioritize performance of CPU blades.
In this mode, if the EM card cannot accept a new power request from a CPU blade
while maintaining power redundancy, the EM card releases the power redundant
configuration and permits the new power request from the CPU blade.
IMPORTANT: If a power unit fails during operation under the release
of the power redundant configuration, then the system may be forcibly
shut down.