Owner's Manual

Power Management 357
Using RACADM
Open a serial/Telnet/SSH text console to CMC, log in, and type:
racadm config -g cfgChassisPower -o
cfgChassisPowerCap <value>
where <value> is a number between 2715–16685 representing the
maximum power limit in watts. The default is 16685.
For example, the following command:
racadm config -g cfgChassisPower -o
cfgChassisPowerCap 5400
sets the maximum power budget to 5400 watts.
NOTE: The power budget is limited to 16685 Watts. If you attempt to set an AC
power budget value that exceeds the power capacity of your chassis, CMC displays
a failure message.
Server Power Reduction to Maintain Power Budget
CMC reduces power allocations of lower priority servers when
additional power is needed to maintain the system power consumption
within the user-configured System Input Power Cap. For example,
when a new server is engaged, CMC may decrease power to low
priority servers to allow more power for the new server. If the amount of
power is still insufficient after reducing power allocations of the lower priority
servers, CMC lowers the performance of servers until sufficient power is freed
to power the new server.
CMC reduces server power allocation in two cases:
• Overall power consumption exceeds the configurable System Input Power
Cap
(see "Setting the Power Budget" on page 356.)
• A power failure occurs in a non-redundant configuration.
For information about assigning priority levels to servers, see "Executing
Power Control Operations on the Chassis" on page 358.