ProLiant DL360 G2 Server High-Density Deployment

ProLiant DL360 G2 Server High-Density Deployment 12
The relationship among the current, the voltage and the power for the power supply input is as
follows:
Input Current = Input Power / Input Voltage
For example,
Input Current = 100 W /110 V = 0.91 A
Input Current = 100 W /208 V = 0.48 A
The input power of a server depends on the operational state of the system. For example, during
the initial power up, a server consumes more power due to the hard disk drives spin-ups. It should
be noted that in the ProLiant DL360 G2, the two hard disk drives spin-up one after the other.
Therefore, the peak input power requirement changes significantly when the first drive is added,
but not as much when the second drive is added. After the initial power up, the input power varies
depending on the operating system and the application software running on the server. During
standby, only the auxiliary portion of the power supply is consuming power to support operations
of a very limited part of the system, for example, the Remote Insight Lights-Out Edition option,
NICs, and so on.
The thermal dissipation can be calculated from the input power as follows:
Thermal Dissipation = Input Power * 3.41
For example,
Thermal Dissipation = 100 W * 3.41 = 341 BTUs/hour
Thermal Dissipation = 292 W * 3.41 = 996 BTUs/hour
The easiest way to calculate the thermal dissipation for the entire rack is to add the input power
requirements for all the servers and other units populated in a rack, and then multiply the total
input power by 3.41.
Measured Input Power
Table 6 lists the measured input power of ProLiant DL360 G2 with varying subsystem
components, to illustrate the effects of adding or removing optional components. Table 7 lists
each subsystem component's input power derived from Table 6. A few test programs were run to
exercise various parts of the system. Also, the current and power were measured on the input side
of the power supply. The “peak” and “typical” input power values were measured during power
up and idle/normal operations, respectively.
Table 6. Measured Input Power for Selected Server Configurations
Configuration
Number
ProLiant DL360 G2 Configuration
Power Input
Typical / Peak
1 1 x 1.4 GHz, 2 x 128 MB, 1 x 18.2 GB (base-line) 146 W / 153 W
2 2 x 1.4 GHz, 2 x 128 MB, 2 x 18.2 GB 189 W / 196 W
3 2 x 1.4 GHz, 4 x 1 GB, 2 x 18.2 GB 195 W / 205 W
4 2 x 1.4 GHz, 4 x 1 GB, 2 x 72.8 GB, 2 x 5302 244 W / 257 W
Note: Peak power of a fully configured ProLiant DL360 G2 server (Configuration 4 was
measured to be only about 83% of its rated peak input power).
1713-0702A-WWEN