HP DL320 hp ProLiant DL320 generation 2 server high-density deployment - Page 26

hp ProLiant DL320 generation 2 server high-density deployment technical white paper 26 configuration C: traditionalist (28 servers, 24 A low voltage) The following calculation verifies supporting 28 servers (derated power budget) with 24 A low-voltage PDUs: Since there are 4 PDUs supporting 28 servers, each PDU will need to support up to 7 servers. A 24 A low-voltage PDU supporting 7 servers can allocate each server with maximum current of 24/7 = 3.43 A. Assuming 110 V, the allocated maximum input power for each server will be: 3.43 A * 110 V = 377 W The maximum thermal dissipation per server will be: 377 W * 3.41 = 1285 BTUs/hour For 28 servers, the total thermal dissipation will be 1285*28 = 35,995 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 241 W, then 28 servers can be supported via this configuration summary. Table 13. Configuration C Summary Configuration C Summary Rack Contents Units 28 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 28 Power cords going to 4 PDUs in the side panels [These cables are supplied with the servers.] Cables External to Rack 28 Management network cables from the optional Remote Insight Lights-Out Edition's RJ-45 connector to external switches 28 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 35,995 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.] 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. (See Note A.) 1 Contains 8 PDU brackets Note: This list does not include the rack, the servers, and the network cables. (A) Low-voltage PDUs are available only in North America and Japan.