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The maximum wattage requirement for blade serves varies depending on the type
of blade server installed in the BladeCenter S system. For the latest information
related to power consumption and requirements for blade servers, see the IBM
System x and BladeCenter Power Configurator at http://www-03.ibm.com/
systems/bladecenter/powerconfig/.
Power management policies
You can set the power management policy to be used for the BladeCenter S system
from the advanced management module.
You can choose from the following power management policies:
v AC power source redundancy
v AC power source redundancy with blade throttling allowed
v Power module redundancy
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BladeCenter S Type 7779/8886: Planning Guide
Table 5. Power consumption of BladeCenter S system components (continued)
Component
Serial pass-thru module
Note: Power for the serial pass-thru module is provided by
the blade servers.
With this policy, the total allowable power draw is limited to the capacity of two
power modules. If you use dual ac power sources, one ac power source can fail
without affecting the operation of the blade servers. However, some blade
servers may not be able to power on if doing so will exceed the power policy
limit.
The policy is intended for use when you have four power modules installed and
two separate 220-volt AC power sources.
This policy is similar to AC power source redundancy. With this policy, the total
allowable power draw is limited to the capacity of two power modules. If you
use dual ac power sources, one ac power source can fail without affecting the
operation of the blade servers.
If power module redundancy is lost, processors on blade servers that are capable
of throttling will throttle to reduce the power consumed to less than or equal to
the total power. Throttling refers to achieving lower power consumption for a
blade by temporarily reducing the CPU throughput. The advanced management
module utilizes power management technologies built into certain processors to
throttle the blades.
Note: Not all blade servers are capable of throttling.
The policy is intended for use when you have four power modules installed and
two separate 220-volt AC power sources.
With this policy, the total allowable power draw is limited to one less than the
number of power modules when more than one power module is present. One
power module can fail without affecting blade server operation.
Blade servers will power on only if they can operate without throttling if there is
a power module failure. The number of blade servers allowed to power on is
determined by the power available from one less than the total number of
power modules. If a single power module fails, all the blade servers that are
powered on will continue to operate at normal performance levels. If two or
more power modules fail, the BladeCenter S chassis could power off.
Maximum Watts
0W
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