Owner's Manual

Power Management 347
Redundancy
Policy
Displays the current redundancy configuration: AC Redundancy,
Power Supply Redundancy, and No Redundancy.
AC Redundancy — Power input is load-balanced across all PSUs.
Half of them should be cabled to one AC grid and the other half
should be cabled to another grid. When the system is running
optimally in AC Redundancy mode, power is load-balanced across
all active supplies. In case of a grid failure, the PSUs on the
functioning AC grid take over without interruption.
Power Supply Redundancy — The capacity of the highest-rated
PSU in the chassis is held in reserve, ensuring that a failure of any
one PSU does not cause the server modules or chassis to power
down.
Power Supply Redundancy may not use all six PSUs; it uses
sufficient PSUs to assure that on the failure of any one the
remaining can continue to supply power to the chassis. The other
PSUs may be placed in Standby mode if DPSE is enabled.
No Redundancy — The power from all active PSUs are sufficient to
power the entire chassis, including the chassis, servers, I/O modules,
iKVM, and CMC. The remaining PSUs may be placed in standby
mode if DPSE is enabled.
CAUTION: The No Redundancy mode uses only the minimum
required number of PSUs at a time, with no backup. Failure of
one of the PSUs in use could cause the server modules to lose
power and data.
Dynamic Power
Supply
Engagement
Displays whether Dynamic Power Supply Engagement is
enabled or disabled. Enabling this feature allows CMC to put
under-utilized PSUs into standby mode based on the redundancy
policy that is set and the power requirements of the system. Putting
under-utilized PSUs into standby mode increases the utilization,
and efficiency, of the online PSUs, saving power.
Table 9-12. System Power Policy Configuration
(continued)
Item Description