Compaq ProLiant DL360 Ultra-Dense Server Deployment in Compaq Racks

Compaq ProLiant DL360 Ultra-Dense Server Deployment in Compaq Racks 38
128H-1100B-WWEN
3.4 Configuration-D: 42 De-rated Servers, Low
Voltage
The following calculation verifies supporting 42 servers (de-rated Power Budget) with 24A Low
Voltage PDUs:
Since there are 4 PDUs supporting 42 servers, each PDU will need to support up to 11 servers. A
24A Low Voltage PDU supporting 11 servers can allocate each server with maximum current of
(24/11=) 2.19A. Assuming 110V, the allocated maximum input power for each server will be
2.19A * 110V = 241W
The maximum thermal dissipation per server will be
241W * 3.41 = 822 BTUs/hour
For 42 servers, the total thermal dissipation will be (822*42=) 34,524 BTUs/hour.
In Section 2.2, a fully configured system was measured to consume lower than 200W (Table 2-3,
Server Configuration-5). Hence, if each de-rated server configuration input power is lower than
241W then 42 servers can be supported via this configuration summary.
Table 3-11. Configuration D summary
Configuration-D Summary
Rack Contents
Units
42 servers with all fixed or all sliding rails with cable trays
4 Low Voltage 24A PDUs vertically mounted in the side panel compartments
Internal Cables
42 power cords going to 4 PDUs in the side panels [These cables are supplied
with the servers.]
Cables External to Rack
42 (management) network cables from the optional Remote Insight Lights-Out
Edition’s RJ45 connector to external switches
42 (data) network cables from on-board RJ-45 to external switches, assuming
use of only one LAN connection per server
4 input power cords from the rack to external power outlets
Site Utility Requirements (worst-case)
Power: 4 dedicated 100V-120V 30A branch circuits.
Thermal: up to 34,520 BTUs/hour [This number is a worst-case. The actual
BTUs/hour will depend on the OS/application software running and the server
hardware configurations.]
Weight: up to 1,690 lb (with sliding-rails) [The network cables are not
accounted for since most implementations route the network cables to the
ceiling-hung cable rails outside of the rack.]