hp ProLiant DL320 generation 2 server high-density deployment technical white paper 18
suggested rack configurations
Listed in Table 10 is a Quick Reference table with suggested rack configurations for deploying
the ProLiant DL320 Generation 2 servers. Examples of these configurations are given in the
“Configuration A
”, “Configuration B”, and “Configuration C” sections of this paper.
Table 10. Suggested Rack Configurations Quick Reference
Configuration A B C
Priority Maximum Performance
Density
Maximum Flexibility Traditionalist
Rack Size 42U 42U 42U
Server Count 42 35 28
Power Source High Voltage Low Voltage Low Voltage
Rack Level Power
(derated)
9996W 8750W 7000W
PDU 2x40 Amp Modular PDU 2x40 Amp Dual Input PDU 4x24 Amp Dual Input PDU
KVM No Local KVM Console 52x8 Port KVM Switch
IP Connections 6x16 Port Switch (0+16) for
Data
2x24 Port Switch (0+16) for Data
configuration A: maximum performance density (42 derated servers, 24
A high voltage)
This configuration shows a “best practice” for a 42U rack with 42 servers in a high-voltage
facility where a deployment plan can accommodate the derating of each server. The “power and
thermal budgeting” section of this paper explains power budgeting methods and measured power
for different base-line configurations and subsystem components. The following calculation
verifies supporting 42 servers with 24 A high-voltage PDUs:
Since there are 2 PDUs to support 42 servers, each PDU needs to support 21 servers. A 24 A
high-voltage PDU supporting 21 servers can allocate each server with a maximum current of
24/21 = 1.143 A at 208 V. Therefore, the allocated maximum input power for each server will be:
1.143 A * 208 V = 238 W
The maximum thermal dissipation per server will be:
238 W * 3.41 = 812 BTUs/hour
For 42 servers, the total thermal dissipation will be 812*42 = 34,104 BTUs/hour
.
In the “power and thermal budgeting” section, a fully configured system was measured to
consume lower than 250 W (Table 3, server configuration 4). If each derated server configuration
input power is lower than 238 W, then 42 servers can be supported with this configuration
summary.
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