HP 1U User's Manual
Contents
1. VT100 terminal emulation Software flow control may also be called XON XOFF The serial port on the HP BladeSystem p Class 1U power enclosure does not support hardware flow control settings Remote access to the serial port IT administrators can enable remote access to the serial port in two different ways 1 Through the HP Serial Console Servers software which allows serial devices to be accessed remotely through an IP network or 2 Through the HP IP Console with the Serial Interface Adapter NOTE HP Serial Console Servers and HP IT Console with Serial Interface Adapter can also be used for remote access to other devices with a serial port For additional information about HP Serial Console Servers and HP Serial Interface Adapter www hp com go kvm Efficient cabling The HP BladeSystem p Class 1U power enclosure uses a well organized cabling system to connect to the server blade enclosure and any attached Power Distribution Units PDUs The 1U power enclosure provides a direct power connection to the server blade enclosure through two dedicated DC power cables Figure 4 Figure 4 The 1U power enclosure power cables connected to the server blade enclosure Each server blade enclosure is rated to support up to 6 000 W 3 000 W per side and thus 3 000 W per cable The individual DC power cables are sized to support the worst case power tolerances At the lowest possible power supply voltage of 48 8 V t2. Each enhanced server blade enclosure is populated with ProLiant BL35p server blades and supported by a 1U power enclosure with four power supplies installed The 1U power enclosures are attached to two 24 A modular PDUs The ProLiant BL35p server blades have two single core 2 4 GHz processors with 1 MB L2 cache 4 GB of RAM and one 60 GB hard drive resulting in 4 270 VA input Four power supplies are needed in the 1U power enclosures for redundant power The 24 A modular PDU used in this configuration has a load capacity of 4 992 VA so it can support one server blade enclosure populated with ProLiant BL35p server blades Figure 9 Rack with enhanced server blade enclosures populated with ProLiant BL30p server blades three 1U power enclosures and six 24 A modular PDUs 12 Using ProLiant BL30p server blades In this configuration the rack contains four enhanced server blade enclosures four 1U power enclosures and six PDUs Figure 10 Each enhanced server blade enclosure is populated with ProLiant BL30p server blades and has a 1U power enclosure with six power supplies installed The 1U power enclosures are connected to two 40 A modular PDUs The ProLiant BL30p server blades have two single core 3 2 GHz processors with 2 MB L3 cache 4 GB of RAM and one 60 GB hard drive resulting in 5 768 VA input Six power supplies are needed in the 1U power enclosures for redundant power The 40 A modular PDU has a load capacity of 8 320 VA so it c
3. In a rack with multiple 1U power enclosures the power supplies installed in bay 1 in each of the 1U power enclosures should not be plugged into the same phase Each installed power supply in bay 1 should be connected to a different phase on the PDU 13 Power supplies installed in bay 2 in each of the 1U power enclosures should also be connected to a different phase on the PDU Figure 8 illustrates how 1U power enclosures should be connected with four power supplies installed NOTE The grayscale outlets on the PDU in Figure 8 indicate which phase the outlet is attached to The wires are color coded to distinguish the connections to power supplies installed in bus A and bus B Power supplies are numbered in reverse because the view is from the rear of the 1U power enclosure Figure 8 HP BladeSystem p Class 1U power enclosures connections rear view o 04 gay ttg o ry er le CC Ci es CIEN CSCA CAK Phase 2 Phase 3 EJE CJE a Ee ES lt lt E Tida cs Ae Cs Phase 1 Phase 2 Phase 3 14 Standard configurations The following configurations review some common usage scenarios for the HP BladeSystem p Class 1U power enclosure including the type of server blades populated and PDU options Using ProLiant BL35p server blades In this configuration the rack contains three enhanced server blade enclosures three 1U power enclosures and six PDUs Figure 9
4. correct power zone operation As of firmware release 2 20 there are important changes in how power zones are managed In firmware releases prior to 2 20 there were only two power zones zone 1 and 2 that were set by a switch on the rear of 3U power enclosures Firmware 2 20 provides the capability to have up to six power zones based on the absolute maximum hardware that could fit into one rack The power zone switch on the rear of the 3U power enclosure only has a setting for zone 1 and 2 new power zones start at 3 to avoid overlap with existing power zones The primary difference in setting the new power zones is that they are not set by a switch on the power enclosure The switch is still present on HP BladeSystem p Class 3U power enclosures for legacy firmware but firmware version 2 20 and above do not use the switch The new power zones 3 and above are set automatically by the firmware based on rack topology Unlike the 3U power enclosure the 1U power enclosure does not have a power zone switch because it was released with firmware 2 20 Every power zone must include a power source either the 1U power enclosure or the 3U power enclosure and at least one server blade enclosure In the pre 2 20 firmware environment if a server blade enclosure were in zone 2 and the power enclosure supporting it were in zone 1 the server blades and switches in that sever blade enclosure would never power on automatically because the devices in the server blade
5. enclosure must request power from a power source in their own zone in order to power on If the power source is not in the same zone as the server blade enclosure the request for power is not answered because power is not available in that zone To ensure that all power enclosures and server blade enclosures are configured in the proper zone all enclosures in a rack should be upgraded to firmware 2 20 If one enclosure in an infrastructure is upgraded to firmware 2 20 and the other enclosures are not upgraded e The enclosure upgraded to 2 20 is put into power zone 3 e The enclosures not upgraded are placed in power zone 1 or 2 depending on the zone in which the physical switch is set Once all the enclosures in a rack are upgraded to firmware 2 20 the switch setting on the rear of the enclosure no longer serves a functional purpose After an upgrade to firmware 2 20 power zone 1 and 2 are no longer used since the power zones are set automatically by the firmware based on rack topology not switch settings HP does not support mixed firmware versions within the same infrastructure All enclosures should have the same firmware version NOTE For more information on upgrading your firmware see Chapter 5 of the HP ProLiant BL System Best Practices Guide http h20000 www2 hp com bc docs support UCR SupportM anual TPM_351359 001_rev1_us TPM_351359 001_revl_us pdf Dynamic power saver The dynamic power saver feature in the
6. of a cascading failure where the UPS side fails first If the AC power fails the UPS handles the load on its side which begins to discharge the UPS If the PDU side fails the whole system can potentially fail without initiating a controlled shutdown because of the power drain on the UPS The ultimate level of availability and protection is provided by the dual feed dual protection configuration Figure 13 bottom This configuration always provides for an orderly shutdown when a complete loss of utility power occurs 20 Figure 13 AC feed redundancy using the HP R5500XR UPS Single feed single protection gt Dual feed single protection Dual feed dual protection Conclusion The HP BladeSystem p Class 1U power enclosure is a vital component of the HP BladeSystem infrastructure and plays an important role in helping HP customers build an adaptive enterprise It provides costeffective efficient hot plug redundant power for single server blade enclosure deployments IT environments can use this solution for blade evaluation purposes distributed server blade deployments to remote locations and heterogeneous server blade deployments within a single rack IT environments with deeply entrenched power distribution environments can leverage the 1U power enclosure to help accommodate existing PDU strategies The HP BladeSystem p Class 1U power enclosure also has backwards compatibility allowing IT administrators at small an
7. outputs to power industry standard IT equipment One advantage of using three phase PDUs is that more power can be delivered to a rack with fewer power drops For example at 208 V a 30 A single phase circuit delivers 4 992 VA while a three phase circuit delivers 8 640 VA Also when comparing similar power levels the size for the wiring and connectors is significantly smaller with three phase power Phase balance is an important consideration when working with three phase power For optimum efficiency the load attached to a three phase source should be balanced across all three phases It is possible to balance the load by simply installing six power supplies in the 1U power enclosure however this may not lead to the most efficient use of PDU outlets or power Manually balancing the load by plugging in power supplies across phases when using a three phase PDU may provide for a more efticient usage of outlets and power Dynamic power saver and three phase input PDUs Dynamic power saver also affects the phase loads on a three phase input PDU The key is to ensure that the load is balanced as well as possible across all three phases The determined sequence in which the power supplies are placed into standby should prevent any single phase from being excessively loaded When dynamic power saver is enabled power supplies one and four are always powered power supplies two and five are powered next and power supplies three and six are powered last
8. paper is written with the assumption that readers are already familiar with the HP BladeSystem Introduction The HP BladeSystem consists of modular components that enable IT administrators to readily modify and scale their infrastructures to meet changing IT demands The ability to provide required power to servers and use it efficiently is a critical IT need The HP BladeSystem includes two power subsystem options a 3U power subsystem and a 1U power subsystem This paper describes the 1U power subsystem only Refer to www hp com go bladesystem for information about the 3U power subsystem The 1U power subsystem includes an HP BladeSystem p Class 1U power enclosure configured with embedded power supplies and a power management module Power supply and AC line cord redundancy is provided when powering one fully configured HP BladeSystem p Class server blade enclosure The power management module enables IT administrators to efficiently monitor and manage total enclosure power consumption Choosing an optimal power solution requires the consideration of many factors including the number of server enclosures needed the type of server blades to be installed and the type of available power The HP BladeSystem p Class 1U power enclosure is particularly well suited to the following IT environments e Small or mid size businesses using server blades in their infrastructure e Remote or branch offices with distributed server blade deployments e
9. 8 Monitored PDU and 332 Monitored PDU The 348 and 332 PDUs mount in the rear of the rack so there are no issues with access to breakers or line cords However access can be enhanced using a rear extension kit which adds an extra 155 mm or 6 inches of depth to the rear of the rack The addition of the rack light kit can also significantly increase ease of use and access North America Japan Install four HP 17 3 kVA S348 Monitored PDUs This provides 24 four C19 outlets and 34 6 kVA of power and supports up to six 1U power enclosures of 5 7 kVA each For 1U power enclosures of 2 8 kVA or less two 348 Monitored PDUs are sufficient International Install four S332 Monitored PDUs This provides 42 kVA of power and can support six 1U power enclosures of any configuration For 1U power enclosures of 3 52 kVA or less two S332 Monitored PDUs are sufficient Supported contigurations for the 40 A PDU The 40 A PDUs can be mounted in a 1U configuration which is recommended for best access or in the OU space in the side of the rack which may provide restricted access to the PDU breakers The following configurations are potential solutions to provide power for six server blade enclosures powered by six 1U power enclosures and a 40 A PDU 18 47U rack Mounting the PDUs in the 1U configuration requires an additional 3U of vertical space in the rack Three PDUs must be mounted facing the front of the rack and three PDUs must be mounted f
10. HP BladeSystem p Class 1U power enclosure provides for efficient use of power in the server blade enclosure When this feature is enabled total power consumption is monitored in real time Power supplies are placed in a standby condition when the power demand from the server blade enclosure is low As power demand increases the standby power supplies activate as necessary to deliver the required power This enables the power enclosure to operate at optimum efficiency Optimum efficiency can be achieved because of the power supply efficiency curve associated with any power supply Power supply efficiency is simply a measure of power in versus power out so at 50 percent efficiency 2 000 W in would equal 1 000 W out The difference is wasted energy which costs money Dynamic power saver recognizes that most power supplies operate less efficiently when lightly loaded and more efficiently when heavily loaded A power supply installed in the 1U power enclosure running with a 10 percent load could have efficiency as low as 50 percent but with a 50 percent load efficiency increases to over 90 percent providing a significant savings in power consumption Dynamic power saver drives power supply efficiency by shifting the load so there is a heavier load on fewer power supplies as opposed to a lighter load on all the installed power supplies Redundancy with dynamic power saver Redundant power is maintained in dynamic power saver mode The 1U power enclo
11. IT environments with single phase power requirements Components of the enclosure The HP BladeSystem 1U power enclosure supports high availability by providing hot plug redundant power supplies redundant AC inputs and a hotplug power management module that operates independently of the server blades and interconnects Hot plug redundant power supplies The 1U power enclosure houses up to six hot plug power supplies each unit rated at 2 000 W DC output power The enclosed six power supply bays are divided into two sides with three bays on bus A and three bays on bus B Figure 1 and Table 1 Figure 1 HP BladeSystem p Class 1U power enclosure bays Table 1 HP BladeSystem p Class 1U power enclosure bay descriptions Item Configuration To implement a redundant configuration using power supplies in the 1U power enclosure one or more of bays 1 through 3 and an equal number of bays 4 through 6 must be populated with a power supply Redundant AC power For redundant AC power bays 1 through 3 must be supplied with AC power from a different branch circuit than bays 4 through 6 Each bay must be supplied with single phase AC power according to the specifications in the QuickSpecs which are located at http 7h18004 www 1 hp com products quickspecs 12330 div 12330_ div html The branch circuit should have adequate capacity to handle the peak current demands of a fully populated 1U power enclosure when attached to a fully populate
12. The HP BladeSystem p Class 1U power enclosure hot plug redundant power for a server blade enclosure technology brief POS ACs aero terete ce tect gests do orto nae en secre segs sho tbo a emesis A AE 3 Ma ee 1 ss cre EAA eee acer ca sac ce sees E E A T E E A E E E 3 Componenis othe enclos re sisssaiccrssanire serinin ai E aR e TTO EA Eara EEE TEESE TAES 3 Hot plug redundant power supplies ccccccccccecesseeeeeeeeeeee ess eeeeeeeeeeees see eeeeeeeeeeessseeeeeeeseeeessaaeeeeeeess 3 Redondan AG PON le er satires ares ecer E T 4 Hot plug power management module cccccccccee ee eeeeeeeeeeee ees eeeeeeeeeeeee esse eeeeeeeeeeessaeeeeeeeeeeeasaaaaeeeeeeess 5 Features Othe enclosure csi ecs cars gaaraeceye nacecs vas saaseacanathagead N a S SENS 5 Bi directional electronic e fuse ccc 5 POWE Z E E EEEE EE E E E E E E ee ee 5 Firmware in mixed Sy MONMEMIS ciccas wecancsenmscees isecauinassawesseentoocens a ERa O AEAEE SEEN aT ogee 6 Dynamic power SOC Eo esserethe crane ana eethseoestawareenmemneew teanares atawin ay concn ESE ESE causa tdectnetens causa tactmsnneccusattactenst 7 Redundancy with dynamic power saver sssssssssissssssssssrierrssssstrrrerssssstrrrrrsssssrrrrrerssssrrrrrrsssreren 7 Enabling dynamic power Saver sessisssisrsrrisscsaiasivisiosadson iadro ataie r tadi eien dka ded a rada iioii doridisi 8 SSPE OCU A E E O E E IE A OE T O O A 8 Remote access to the serial port sssssssninssssssssrenrrssssrrtr
13. acing the back of the rack Figure 12 This provides 42U of vertical space for the servers and power enclosures and 3U additional space for the PDU mounting This configuration must be assembled onsite as it is not available through Factory Express Figure 12 Partial diagram of front and back mounted PDUs Front Back 800 mm wide 42U rack The 800 mm wide rack ships standard with vertical blanking panels that block air recirculation back to the front of the rack Each side of the rack provides 100mm approximately 4 inches of space on either side of the rack for access to the OU space Access to the PDUs from the front of the rack can be gained by removing the three screws that secure the vertical blanking panels This configuration must be assembled onsite as it is not available through Factory Express 19 Standard 42U rack This configuration while possible may cause issues because of the limited access to the PDUs in the OU space after all the servers are installed HP recommends mounting the modular PDU in the 1U contiguration for best access to breaker actuators and receptacles Otherwise in the event of a failure access to the PDU breakers requires the removal of server blade and power enclosures from the rack This configuration is only recommended in these situations e The rack is a stand alone unit and there is clear access to both sides of the rack by simply removing side panels e There is sufficient space on each sid
14. an support one server blade enclosure fully populated with ProLiant BL3Op server blades with 2 552 VA extra capacity Each power supply has a load of 1 923 VA an extra power supply unit can be connected to each PDU and cross wired as shown in Figure 10 Figure 10 Proposed configuration using four enhanced server blade enclosures populated with ProLiant BL30p server blades four 1U power enclosures and six 40 A modular PDUs 16 Using ProLiant BL20p server blades In this configuration the rack contains six enhanced server blade enclosures six 1U power enclosures and six PDUs Each enhanced server blade enclosure is populated with ProLiant BL2O0p server blades and has a 1U power enclosure with four power supplies installed The 1U power enclosures are connected to two 40 A modular PDUs The ProLiant BL20p server blades have a single core 3 6 GHz processor with 2 MB L2 cache 4 GB of RAM and two 18 GB 15 000 RPM SCSI hard drives resulting in 3 714 VA input Four power supplies are needed in the 1U power enclosure for redundant power The 40 A modular PDU has a load capacity of 8 320 VA so it can support two server blade enclosures fully populated with ProLiant BL20p server blades Figure 11 Proposed configuration using six enhanced server blade enclosures populated with ProLiant BL2Op server blades six 1U power enclosures and six 40 A modular PDUs 17 Risks associated with extreme density While it is possible to build a
15. ault Serial port The serial port on the back of the HP BladeSystem p Class 1U power enclosure provides a way for IT administrators to directly monitor the status of the 1U power enclosure As shown in Figure 3 and explained in Table 3 detailed information can be obtained through the serial port Table 3 Status information displayed through the serial port Status information Description Uptime Shows the amount of time the system has been powered on Power supply location slot number status Provides the physical location of power supplies their fault status power power usage input output temperature usage and operating temperatures Enclosure backplane temperature Displays the temperature on the enclosure backplane Number of fault conditions Shows the number of unresolved faults in the system Status of unit identification UID LED Specifies whether UID LED is active or not Status of enclosure link Provides information as to whether the link is connected or not the enclosure link connects to the blade enclosure Management module firmware version Shows revision of the management firmware Overall power usage Tabulates total power usage of all the power supplies in the enclosure Status information Power supply redundancy enclosure N 1 redundancy AC feed redundancy Bus balancing Description Indicates whether there are sufficient power supplies to take over the load in the event that one power supply failed wit
16. bsystem remains redundant in the event of an AC line feed failure both feeds and the associated PDUs must be sized to take the full load of the attached 1U power enclosures Maximum rated VA capacity The key variable to consider when using PDUs with the 1U power enclosure is the maximum rated VA load capacity for the PDU The HP Power Calculator allows the calculation of the input VA requirements of the 1U power enclosure to support any given server blade configuration Once the total input VA rating requirement tor the 1U power enclosure is obtained compare this to the rated load capacity of available PDUs to determine how many 1U power enclosures can be supported Number of PDU outlets Planners must also factor in the number of outlets available on the PDU For example the HP 40A NA PDU 252633 B4 has a maximum capacity of 9 200 VA Theoretically in a redundant contiguration three full server blade enclosures populated with ProLiant BL30p server blades with 3 06 GHz processors rated at 5 300 VA could be connected to four of these PDUs However each PDU has only four outlets while each enclosure requires six connections at 5 300VA resulting in 16 available outlets to accommodate 18 required connections an impossible contiguration Three phase input Planners should consider whether using a three phase input PDU is a viable option Three phase PDUs take standard three phase power input feeds and convert the power to standard single phase
17. d medium sized businesses to leverage their previous IT investments by fitting the 1U power enclosure into existing racks in their infrastructure 2 For more intormation For additional information refer to the resources listed below Resource description Web address HP BladeSystem website www hp com go bladesystem HP BladeSystem p Class Enclosure http 7h20000 www2 hp com bc docs support SupportManu Installation Instructions al c00383406 c00383406 pdf HP BladeSystem p Class 1U Power Supply http h20000 www2 hp com bc docs suppornt SupportManu Installation Instructions al c00333401 c00383401 odf HP power distribution units website http h18004 www1 hp com products servers proliantstora e power protection power distribution index html HP rack mountable uninterrupted power http h18004 www 1 hp com products servers proliantstora supplies website e power protection rackups index html 2005 Hewlett Packard Development Company L P The information contained herein is subject to change without notice The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services Nothing herein should be construed as constituting an additional warranty HP shall not be liable for technical or editorial errors or omissions contained herein TC051203TB 12 2005 invent
18. d server blade enclosure If only one side of the power enclosure is populated with power supplies the power subsystem is not redundant If AC redundancy is not required three power supplies located in any three bays can provide adequate power for a fully loaded server blade enclosure Hot plug power management module The hotplug power management module monitors the power subsystem components and regulates the power up sequence of newly installed server blades and interconnect switches The power management module is connected with cables to the server blade enclosure management module s to facilitate communication of management information such as server blade and interconnect location power supply budget and health status Features of the enclosure The HP BladeSystem p Class 1U power enclosure provides for power subsystem management with the following features e Bi directional electronic e tuse provides prompt power up e Power zones provide communication and management capabilities between power enclosures and supported server blade enclosures e Dynamic power saver achieves efficient power consumption e Serial port allows direct monitoring of the 1U power enclosure status e Efficient cabling reduces clutter in the area behind the 1U power enclosure Bi directional electronic e fuse The 1U power enclosure has a bi directional electronic e fuse switch that connects the 48 V DC outputs on bus A to the 48 V DC outputs on b
19. d with ProLiant BL3Op server blades 6 More than 3 000 W required per enclosure 4 More than 4 000 W required per enclosure 6 To determine power requirements for an enclosure use the HP Power Calculator available at www hp com go bladesystem powercalculator The HP BladeSystem p Class sizing utility is a Microsoft Excel workbook with a power calculator it can be used to help determine the correct modular components for specific IT environments Figure 7 The HP Pega em p Class Sizing utility PowerSelection a Revision 0 53 HP BladeSystem p Class Sizing September 6 2005 h Power Summary Equipment List Server Information Rack amp Power Rack amp Power invent Bottom Top 10642 42 Rack Cabinet Pallet Input Voltage AC Line Input Phases AC Redundancy C 240Vac 208Vac ike 7 Single Phase O Non Redundant J8Voc 230Vac 220Vac w Three Phase Redundant System is Ac Redundant Using PDUs with the 1U power enclosure When using PDUs within an HP BladeSystem environment key considerations include redundancy voltampere VA capacity of the PDU number of PDU outlets and using PDUs with single phase or three phase inputs Redundancy Planners must consider redundancy when determining how to distribute power using PDUs The normal method of delivering AC redundancy is to use two separate feeds to each side of the 1U power enclosure referred to as the A feed and the B feed To ensure that the power su
20. e management module when power conditions change For example if an administrator removes a power supply from the HP BladeSystem p Class 1U power enclosure notification is sent to the affected server blade enclosure in that power zone Power zones also define the startup sequence of the server blades when the entire rack needs to be restarted after a total power outage The server blade enclosures communicate with the power enclosures in the rack to ensure that the server blades and enclosures are powered in sequence rather than all at once to prevent overloading the AC infrastructure The sequence always runs from the top of the rack power zone 6 top left hand blade through the top and bottom row of the blades in that enclosure if ProLiant BL30p or BL35p server blades are installed The sequence then proceeds down to the next enclosure and continues until the bottom right blade in the bottom server blade enclosure is powered In a rack that contains many server blade enclosures the sequencing process may cause a significant time delay before the last server blade is powered However this is preferable to the alternative the possibility that the main breakers trip due to the excessive load on the AC infrastructure as all the server blade enclosures try to power simultaneously Firmware in mixed environments When 1U power enclosures and 3U power enclosures are used in the same rack the firmware must be upgraded to the latest version for
21. e of the rack to provide access to the PDUs for breaker and receptacle access e The rack can be rolled forward away from the row to allow side access to the PDUs NOTE For more information on the PDUs discussed in this section visit hito h18004 www1 hp com products servers proliantstorage power rotection power distribution index html Using uninterruptible power supplies UPS with the 1U power enclosure The key factor to consider when sizing a UPS is the supported output wattage for the UPS The UPS output wattage must be matched to the total input wattage of the supported 1U power enclosure When connecting a UPS it is important to remember that VA and W are not the same The HP R5500XR UPS provides the highest level of availability when used with the 1U power enclosure In a single feed environment Figure 13 top lett the R5500XR can support a single 1U power enclosure with up to four installed power supplies This setup can be used to protect the system from unstable power lines and provide a limited amount of backup time for orderly shut down in the event of AC failure A dual feed single protection setup Figure 13 top right can be used to provide an extra level of availability If the AC fails and the PDU side has no power the full load shifts to UPS power to allow for a controlled shutdown UPS software can also be used to perform a controlled shutdown Using this configuration a potential problem can occur in the event
22. eeess 18 Supported configurations for the 348 Monitored PDU and S332 Monitored PDU cccccceeeeeeeeeees 18 PTA ANS TC GI serii tereng E E EE EE ES E E 18 International seccdcscnevaiceracde accdacesuncnedecmareseiedeibide sanedindcanbaebaatesaudhdaganbebeasainguecdedeeketedewdidoniedieusbiabaces 18 Supported configurations for the 40 A PDU gece sictece ae dct Seestdeharadnaicedateaicubiasa douladdeawiindandaucteseaicb ass gadides 18 A AUS ols EEE eae oe ee I ae ee eee ON eT ee ee ee ne ere ee ee eee ee 19 OG an 42U TOCK ose cocntsareenctcte sists cats nsesdooaeeetunesteaequoakunsistatteeadaoanestesoctorssceseamiaanepsioemes 19 andra A 20 Lie cots e A E E cue ae E E E aeeee ee E 20 Using uninterruptible power supplies UPS with the 1U power enclosure ccccccceesseeeseeceeeeeasaseeseeees 20 UN E Neeser E E E neice cing satan g E E A E setransn feutadseg xcdgasnceuanaseasentedond assess 21 F r more IOI MOM sssrinin naie nka AnA E AOE E AEEA EEEREN 22 invent Abstract The HP BladeSystem p Class1U power enclosure provides hotplug redundant power for a single enclosure of HP ProLiant BL p Class server blades from standard single phase AC inputs A properly configured HP BladeSystem p Class 1U power enclosure is an ideal power solution for small office and remote site blade deployments This technology brief explains the 1U power enclosure operation and features as well as infrastructure configuration considerations This
23. fully populated a rack with server blades and retain power supply and line cord redundancy using HP BladeSystem p Class 1U power enclosures several items should be considered prior to implementation The primary issues associated with extreme density that must be seriously considered include heat weight PDU placement and PDU breaker and line cord access after the rack is built Before deploying these contigurations consider the heat load placed on the data center air conditioning system and the weight load placed on the floor There are two methods of properly implementing a rack with six 1U power enclosures installed 1 Install six 40 A modular PDUs in the rack This PDU setup provides power for up to six 1U power enclosures with a maximum of four power supplies in each enclosure It provides sufficient power for all ProLiant BL20 25p configurations ProLiant BL40 45p configurations and the majority of ProLiant BL35p configurations The ProLiant BL30p configuration requires six power supplies per power enclosure Some of the dual core ProLiant BL35p configurations may require six power supplies which can risk overloading the PDUs 2 Use the HP 348 Monitored PDU or 332 Monitored PDU NOTE International configurations can be assembled using the 32 A modular PDU This PDU has slightly less power capacity 7 680 VA versus the 8 320 VA than the 40 A modular PDU Always check the power calculators Supported configurations for the S34
24. he maximum rated sustained output current would be 61 5 A per side and per cable 10 Management link cable To provide two way communication connect a management link cable from the power management module of the 1U power enclosure to the server blade enclosure Figure 5 Figure 5 Management link cable connected from the 1U power enclosure power management module to the server blade enclosure Tete Power distribution unit cables It PDUs are being used they must be connected to the 1U power enclosure in three steps First before connecting any PDU power cables turn off or disconnect facility AC power from the PDUs Secondly connect the PDU power cables to the AC power input connectors on the 1U power enclosure see Figure 6 Lastly once the PDU power cables are connected to the PDUs power to the PDUs can be restored Figure 6 PDU power cables connected to the 1U power enclosure ie Intrastructure contigurations When using the HP BladeSystem p Class 1U power enclosure follow the general guidelines in Table 4 to install the proper amount of power supplies Table 4 General guidelines for power supply installation in the 1U power enclosure Infrastructure Required power supplies installed in 1U power enclosure Server blade enclosure populated with ProLiant BL20p BL25p or BL35p server blades 4 Server blade enclosure populated with ProLiant BL35p dual core server blades 6 Server blade enclosure populate
25. hout causing an enclosure power failure Specifies whether sufficient power supplies are installed for the enclosure to remain powered on if an AC feed is lost Ensures that the load is balance across the Bus A and Bus B feeds Only applies to original p Class enclosure Figure 3 Serial port display A COM 1 9600 Powerlierm 525 File Edit Terminal Communication Options Script Help x Redundant Status ICHE CBE T640 FCO 6000 BBB3 C2B9 gt BOTH B 240 a A F gt 6000 lt 0 DE gt i lt 6000 1640 6000 Total 1212 Total PLoad 240 240 Total To Go 4120 4548 o l Power Load g l Power Management Module Uptime 000518949 7 Class chassis power chassis p class chassis power chassis redundancy key not PS redundant not bus bar redundant not pwr encl redundant Power Available Power Consumed Shared Power Consumed l A l l l 6000 B l 600 H Help M Ma F4 in E Set Serial Number F Faults S Rack Space Redraw Pa F Fr WT 220 7 24s Caps Hold On Line Unable to use default printer A null modem cable can be used to connect the serial port to a terminal Terminal software such as Microsoft Windows HyperTerminal or Minicom for Linux can be used to access the 1U power enclosure status display On the terminal contigure the following settings to allow communication through the serial port e 9 600 bps No parity 8 data bits 1 stop bit
26. irersssssrrrerssssssrrrrersssrsrrrrrrssssssrreresssrrn 10 E MF GO INGE e e a E E se toetsebeceaee s 10 Management link ON ecg a ea cceestrno ge ns as yese searvetetia ns osencectesinse dete sas ser seeneteaaitecteetuatetissedeeias Keesronecsenecanbeiets 11 Power distribution unit CODES in c tc to cauaesindesaiadaiauntihlanda aida ddiceetinicsedosiadauceniel dings ota dtannsindgasanadatereeseiencs 11 Infrastructure configuralionS sissies irna an e Se On EREET E AE REENE iaar eT ee 12 Using PDUs with the 1U power enclosure ccccccccssseeeeeceeeeee ess eeeeeeeeeeeeesseeeeeeeeeeeeessaeeeseeeeeeeeaasaaeeeees 13 Ee EIS e e AI E EE E E E E E EE N 13 Maxim m rated VYA Capaciy cece cece icenen E EEE Aei O E aes cae 13 Itong ere or FOU gUIleis sorsero Enn a Ea E EEEREN EEE 13 Ihreephase Mpui ceniserrri ee ene une E E N 13 Dynamic power saver and three phase input PDUs cccceesseescccceeeeeeeeeeeeeeceseeesseeeeeeeeeeeeeaaaeenees 13 andora con Ora OMS ceea E E T E EE E a E 15 Using Proliant BL3 5p server DIGGS S 2 xcaaaezncessesaennnenacd eereanace aA EE 15 Using ProLiant BL3Op server blades cccccccccccceeseeeeeeeee cess eeeeeeeeeeeesseeeeeeeeeeeeessaeeeeeeeeeeesaaaaeseeees 16 Using ProLiant BL20p server blades 2 axe isadesthiodaaneed cedar cbadse cdi iootavesnhseduntveod teas eadeatsindameadsederbbaians 17 Risks associated with extreme density cccccccccceeessseeeeeeeeeee ess eeeeeeeeeeessseeeeeeeeeeessaeeseeeeeeeeessaaeeeee
27. sure ensures that at least two power supplies one from bus A and one from bus B are active When dynamic power saver is enabled on a 1U power enclosure with six power supplies installed a low load initiates the following sequence 1 Initially all power supplies are powered as normal 2 Power supplies installed in bay 3 and bay 6 are placed in standby 3 Power supplies installed in bay 2 and bay 5 are placed in standby 4 Power supplies installed in bay 1 and bay 4 are always powered at 50 percent load or less to ensure redundancy The reverse sequence applies as the load increases Power supplies that are on standby are activated in pairs and the load is shared so the maximum load on each feed is 50 percent Equal distribution of the load ensures that redundancy is always maintained Enabling dynamic power saver To configure the dynamic power saver the power management module must be removed from the 1U power enclosure and the dynamic power saver feature must be enabled The module is hot pluggable and can safely be removed during normal server operation Figure 2 After enabling the dynamic power saver reinstall the power management module Figure 2 The 1U power enclosure power management module and location of the dynamic power saver switches Table 2 Dynamic power saver switch positions and functions Position Function 1 Dynamic power saver disabled default 2 Dynamic power saver enabled 3 Reserved off def
28. us B Once a single power supply is installed in a bay on either side of the 1U power enclosure that side of the power enclosure is immediately powered Approximately 3 seconds later the internal electronic e fuse switch automatically closes and the other side of the 1U power enclosure is powered as a result In short both sides of the 1U power enclosure are powered even if only one power supply is installed and the 1U power enclosure can operate this way indefinitely With only one power supply installed the built in power management software attempts to limit the number of blade servers allowed to power on An administrator however can override the warning and manually power up the servers The only time the electronic switch in the HP BladeSystem p Class 1U power enclosure opens is when there is a bus short in the power enclosure If a bus short occurs in the power enclosure the electronic e tuse switch quickly separates bus A from bus B The circuitry within the 1U power enclosure automatically and continuously monitors the faulted side Once the fault is cleared the electronic e fuse switch resets and closes automatically restoring full power to both sides of the server blade enclosure This is a rare situation Power zones Power zones when set properly associate server blade enclosures with the power enclosure s that support them This allows power information and alerts to be sent to the proper power management module or server blad
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