Creating High-availability Power Solutions for the ProLiant ML570 Server

creating high-availability power solutions for the ProLiant ML570 server
4
solution for full
redundancy
Full redundancy for the ProLiant ML570 server can be achieved in an environment with
two power grids by combining one dual-input PDU and two single-input PDUs (figure 3).
In this configuration, each of the three power supplies is connected to a different PDU,
and only one of them is connected to the dual-input PDU.
figure 3: fully redundant configuration in an environment with two power grids
Power
Supply
Power
Supply
Power
Supply
ProLiant ML570 Server
Dual Input PDU
Single
Input
PDU
Single
Input
PDU
Power Grid A Power Grid B
The dual-input PDU is equipped with two inputs and a built-in AC transfer switch. If one of
the power grids fails, the power supply connected to the dual-input PDU will switch to the
secondary power grid. Although one power supply will no longer be available, the other
two power supplies will maintain availability of the server. Likewise, if one of the PDUs
fails, the other two PDUs will ensure the availability of at least two power supplies—and
the server.
Another benefit of using the dual-input PDU is that options such as KVM switches,
monitors, and network switches can also gain increased reliability when they are
connected to the dual-input PDU.
To benefit from this configuration, customer environments must meet certain requirements.
First, the environment must be a high-voltage (200-240 VAC) facility. Additionally, the
facility must provide either two L6-30R wall outlets or two IEC309 wall outlets for the
dual-input PDU, plus two additional wall outlets for each of the two single-input PDUs.
More information on PDU amperage capacity and outlets can be found at
www.compaq.com/products/servers/proliantstorage/power-protection/power-
distribution/index.html. Also, details and part numbers for specific supported PDUs,
cords, and options can be found in the QuickSpecs for the ProLiant ML570 server.