HP Insight Control Power Management 7.0 User Guide

Task: Ensuring the sufficient availability of power and cooling for your
data center
After configuring systems and devices in the data center, use the Power/Thermal Analysis page
to view diagnostic information on the power and cooling infrastructure.
In the Power/Thermal Analysis views page,
• Power Status Alerts are highlighted with severity icons to highlight the severity of the alert.
Alerts for contained devices are aggregated to the top-level object displayed.
• Potential overloads are highlighted on the Physical Location tab for exceeded thermal limits
and on the Power Delivery tab for power delivery devices.
For thermal overloads, you may consider the need to move one or more systems to a rack with
more cooling capacity, or by setting an upper limit on power consumption through use of power
capping. For more information, see Task: Protecting your power and cooling infrastructure.
Potential overloads on power delivery devices must be evaluated with care as they may represent
the potential of a tripped circuit breaker and unexpected system down time under the right
conditions. Similar to thermal overloads, you may need to reconfigure systems to receive power
from other power delivery devices to ensure sufficient capacity for all potential demands. Another
option is to protect the power delivery infrastructure by limiting power consumption using power
capping. For more information, see Task: Protecting your power and cooling infrastructure.
Task: Protecting your power and cooling infrastructure
In your data center, after configuring systems and devices, you must finalize the power and cooling
infrastructure. Planning this infrastructure protects your systems and ensures that there is no data
loss because of power problems. By planning this infrastructure, you are notified when systems
are reaching their thresholds of power or cooling limits.
After you have identified a portion of your power and cooling infrastructure that has a potential
for an overload, you did not experience any problem. But, power management analyses indicate
that under a worst-case scenario, your rack may exceed thermal output limits. Or, even still worse
a circuit breaker on a power delivery device may have the potential to trip resulting in loss of
power if all equipment drew maximum power at the same time. The traditional solution to this
problem would either be to relocate systems to areas of the data center with excess power or
cooling capacity to avoid the potential problem, but this solution is disruptive and requires significant
planning. If your systems support HP Dynamic Power Capping, you can reduce the maximum
power consumption and eliminate the potential overload condition by specifying a power cap
value.
To protect your power/cooling infrastructure, perform the following:
1. Make a note of the maximum available power for the set of systems (the rack or the overloaded
power delivery device). This value is reported in the "Potential Overload Analysis" message.
2. Select each system involved individually or press and hold the Shift key to select and add
multiple systems to the selection and click Display Power/Thermal data from the Quick Launch
menu.
3. In the Verify Target Systems step page, the unsupported systems are removed from the selection.
Make a note of the unsupported systems to add their maximum power consumption and
subtract the value from the total power being allocated as mentioned in step 1. Click Next
and confirm that some targets will be removed from the selection.
4. You will now analyze the power requirements for the combination of systems selected based
on power consumption history. It is a best practice that you have enough power history to
identify any potential cyclic peaks (such as end-of-month billing, or perhaps seasonal events).
a. Choose the desired time frame, for example 1 year, and click Draw Graph.
b. In the table that appears below the graph, determine the maximum power consumption
for the set of systems as noted in the Group Peak Power Consumption.
22 Managing power and cooling facilities in your data center