Compaq ProLiant DL360 Ultra-Dense Server Deployment in Compaq Racks

Compaq ProLiant DL360 Ultra-Dense Server Deployment in Compaq Racks 26
128H-1100B-WWEN
2.4 PDU Requirements
This section describes the Compaq PDU types available, and explains the number of PDUs
needed. After reading this section, customers can plan for the necessary facility power lines and
circuit breakers to support a maximum number of ProLiant DL360 servers in a 42U rack.
We have described the power ratings of ProLiant DL360 and Compaq PDU choices in Section
2.1 and 2.3 respectively. The type and number of PDUs required for a rack will depend on the
power requirements for each ProLiant DL360 server, the power source available for a rack, the
console management method, and the number of servers to be deployed in a rack.
The input current requirement (at an input line voltage level) for a ProLiant DL360 server is one
of the most important numbers in planning for a rack configuration. Considering the full rating
for each ProLiant DL360 server, the input current for each server will be 1.41A @208V, or 2.66A
@110V. The number of servers supported by a PDU is calculated by dividing the PDU rated
current (at an input voltage level) by the input current:
For example, for the input current rated to be
• 1.41A at 208V input voltage and using a High Voltage 24A PDU (P/N 295363-003),
Number of Servers to be supported by a PDU = 24A /1.41A = 17.02
Therefore, up to 17 servers can be supported by a 24A High Voltage PDU. That means, 3
PDUs will be needed to support 42 servers (at full server rating).
• 2.66A at 110V input voltage and using a Low Voltage 24A PDU (P/N 295363-001),
Number of Servers to be supported by a PDU = 24A /2.66A = 9.02
Therefore, up to 9 servers can be supported by a 24A Low Voltage PDU. That means, 5
PDUs will be needed to support 42 servers (at full server rating). However, since a Compaq
42U rack can accommodate up to 4 PDUs in the side panel compartments, only 36 servers
can be supported at the input voltage level. The PDU installation in a Compaq 42U rack are
described in Section 4.3.
The number of PDUs necessary or installable for a populated 42U rack with maximum number of
ProLiant DL360 servers will be as follows:
Number of Servers to be supported by a PDU = PDU rated current / Server rated input current