Ultra-Dense Server Deployment in Racks

Compaq Ultra-Dense Server Deployment in Compaq Racks 58
128H-0400A-WWEN
4.3 PDU Installation
PDU installation will vary depending on the number of servers to be installed in a rack, the rack size, and
the PDU type selected. This section describes installation guidelines on where to install the PDUs in a
rack and how to connect the power cords to the PDUs.
The PDU voltage selection will be primarily dictated by the facility power source availability. It is highly
recommended to use high voltage power lines, especially to deploy a 42U rack full of ProLiant DL360
servers since there will be fewer number of external power lines, internal cables, and PDUs. In some
cases, facility low voltage infrastructure may not have enough provision (for example, high enough
current breakers) to support 42 servers in a 42U rack.
4.3.1. Vertically Orienting the PDUs
To support a rack-full of ProLiant DL360 servers, two to four PDUs are to be installed in the side-panel
compartments of the 9000- and 7000-series racks. For the 7000-series racks, the rack frames in the side
panel compartments must be adjusted to fit the PDUs in a vertical orientation. The PDUs cannot be
mounted horizontally, because the ProLiant DL360 rack rails will interfere with the PDUs. Vertical-mount
PDU brackets are needed to install the currently shipping Compaq PDUs in vertical orientation in these
racks as shown in Figure 4-1.
Figure 4-1. A PDU installed in the side panel compartment of a rack using the vertical-mount PDU
brackets and Y-power cords.
There are two option kits available for the Vertical-mount PDU brackets:
1. The Vertical-Mount PDU Bracket with High Voltage Cables Kit (P/N 166097-B21)
This kit contains 4 Vertical-mount PDU brackets, 11 Y-cables, and accessory hardware for high-
volume deployment using High Voltage PDUs.
2. The Vertical-Mount PDU Bracket Kit (P/N 191265-B21)
This kit contains 8 Vertical-mount PDU brackets and accessory hardware for high-volume
deployment. This kit is primarily meant for Low Voltage PDU installations where the power
cords that come with the servers can be used.
The installation card in these kits contains detailed instructions on how to mount the Vertical-Mount PDU
Brackets on a PDU and in a rack.
Vertical-
Mount PDU
Brackets
Y-Junctions of the
Power Y-Cables
PDU
Rear of the rack