Dell PowerEdge R620 Technical Manual

Also see for PowerEdge R620: Glossary Owner's manual Owner's manual Portfolio guide Installation, maintenance and troubleshooting manual

Contents

Dell PowerEdge R620 Technical Manual Manual pdf 36 page image

36 PowerEdge R620 Technical Guidemanagement adjusts cooling according to what the system really needs, and draws lower fanpower draw and generates lower acoustical noise levels than servers without such controls. User-configurable settings: An R620 thermal control design target is to minimize thecontribution of fan power to overall system power. However, with the understanding andrealization that every customer has a unique set of circumstances or expectations of the system,in this generation of servers, we are introducing limited user-configurable settings in the iDRAC7BIOS setup screen. For more information, see theDell PowerEdge R620 Owner’s Manual onDell.com/Support/Manuals and “Advanced Thermal Control: Optimizing across Environmentsand Power Goals” on Dell.com. Cooling redundancy: The R620 allows continuous operation with a fan failure in the system. Environmental specifications: The optimized thermal management makes the R620 reliableunder a wide range of operating environments as shown in the environmental specifications inTable 33. Many configurations are also compliant under expanded operating temperatureenvironments, but a few are not.Acoustical designThe acoustical design of the PowerEdge R620 reflects the following: Versatility: The PowerEdge R620 saves you power draw in the data center, but it also is quietenough for the office environment in typical and minimum configurations. Compare the valuesfor LpA in Table 23 for these configurations and note that they are lower than ambientmeasurements of typical office environments. Adherence to Dell’s high sound quality standards: Sound quality is different from sound powerlevel and sound pressure level in that it describes how humans respond to annoyances in sound,like whistles and hums. One of the sound quality metrics in the Dell specification is prominenceratio of a tone, which is listed in Table 23. Noise ramp and descent during bootup from power off: Fan speeds and noise levels rampduring the boot process (from power off to power on) in order to add a layer of protection forcomponent cooling in the case that the system were not to boot properly. To keep bootup asquiet as possible, the fan speed reached during bootup is limited to about half of full speed. Noise level dependencies: If acoustics is important to you, you may want to make the followingconfiguration choices and settings for the PowerEdge R620 because they result in quieteroperation:— iDRAC7 BIOS settings: Performance Per Watt (DAPC or OS) may be quieter than Performanceor Dense Configuration (iDRAC Settings > Thermal > Max. Exhaust Temperature or Fan speedoffset).— Hot spare feature of power supply unit: In the system default setting, the Hot Spare Feature isdisabled; acoustical output from the power supplies is lowest in this setting.— Hard drive noise is highly dependent on spindle speed; a 7.2K RPM SATA hard drive has thequietest hard drive operation and a 15K RPM SAS hard drive has the loudest.However, some components cause significant but not necessarily intuitive increases in loudnesswhen they are installed in the R620. Contributors to acoustical output can include:— PCIe SSD cards (such as Fusion-io)— GPUs— Express Flash PCIe SSDs— 10Gb NIC— Number of installed processors— Number of installed PCIe cards