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management GUI and Insight Control include a Power Cycle Control switch that lets you cycle power
simultaneously to the redundant outlets for each server. The switch works similarly for a manually
entered device, such as a third-party device, for which the device’s universally unique identifier (UUID)
is properly matched to its outlets.
For more information about Intelligent Power Discovery, read the ―HP intelligent power infrastructure
solutions‖ technology brief at
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02505050/c02505050.pdf.
HP Power Advisor
Overly conservative power provisioning practices over-allocate power to IT devices and underutilize
your data center’s power capacity. Some facilities planners provision power capacity among branch
circuits based on a percentage of the total power supply (faceplate) ratings of the servers on each
circuit. This conservative method usually has a significant error margin that can unnecessarily use up
the data center’s power budget. HP Power Advisor can help you reclaim this trapped capacity and
more efficiently provision power in your data center.
The HP Power Advisor utility helps you calculate the expected power use of ProLiant and Integrity
servers to determine power distribution, power redundancy, and battery backup requirements. It lets
you calculate the power requirements for a single server, a rack of servers, or multiple racks of
servers. These calculations are based on data collected through extensive testing of various HP
ProLiant and Integrity server configurations, running a particular synthetic workload. You can adjust
the calculations to determine server power requirements at different server utilization levels that more
closely match your expected workload.
HP Power Advisor lets you build a virtual infrastructure, component-by-component and rack-by-rack. It
generates a Power Report that you can use to calculate the cost of ownership for a single server or a
rack of servers based on the cost of electricity.
The HP Power Advisor is the first step toward the goal of completely predictable and manageable
power use. Read the ―HP Power Advisor utility‖ technology brief for more information at
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01861599/c01861599.pdf.
HP uninterruptible power supplies
Conventional AC power distribution systems use an online double conversion uninterruptible power
supply (UPS) as shown in Figure 2. The online double conversion UPS converts the utility AC power to
DC, charges a battery bank, and converts it back to AC. A conventional power distribution unit (PDU)
uses a transformer to step down the AC voltage and distributes AC through branch circuits at the input
voltage of the IT devices. Inside servers, power supplies convert the AC power to DC and step down
the voltage to the levels required by the various components. From the UPS to the power supplies, this
distribution chain often delivers less than 75% of the utility power to the IT load.