HP DL320 hp ProLiant DL320 generation 2 server high-density deployment - Page 22

hp ProLiant DL320 generation 2 server high-density deployment technical white paper 22 configuration B: maximum flexibility (35 derated servers, low voltage) The following calculation verifies supporting 35 servers (derated power budget) with 24 A high-voltage PDUs: Since there are 4 PDUs supporting 35 servers, each PDU will need to support up to 9 servers. A 24 A low-voltage PDU supporting 9 servers can allocate each server with maximum current of 24/9 = 2.67 A. Assuming 110 V, the allocated maximum input power for each server will be: 2.67 A * 110 V = 293.7 W The maximum thermal dissipation per server will be: 293.7 W * 3.41 = 1002 BTUs/hour For 42 servers, the total thermal dissipation will be 1002*35= 35,070 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). Since the derated server configuration input power is lower than 293 W, then 35 servers can be supported with this configuration summary. Table 12. Configuration B Summary Configuration B Summary Rack Contents Units 35 Servers with all fixed or all sliding rails with cable trays 4 low voltage 24 A 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 RILOE RJ-45 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 100 V-120 V 30 A branch circuits. Thermal: Up to 35,070 BTUs/hour [This number is a worst-case. The actual BTUs/hour will depend on the operating system/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.] Configuration B Parts List Qty. Notes ProLiant DL320 Generation 2 Sliding Rail Option Kit, P/N 233274-B21 Low Voltage 24 A PDU Option, P/N 207590-D71 Vertical-Mount PDU Bracket Kit, P/N 191265-B21 36 Optional for in-rack servicing 4 N.A. 1 Contains 8 PDU brackets Note: This list does not include the rack, the servers and the network cables. At this time, only one model of the high current (24 A) High Voltage PDU is available. This configuration can be used in regions where NEMA electrical standards are followed.