Dell PowerEdge R510 Technical Manual

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Dell PowerEdge R510 Technical Manual Manual pdf 22 page image

DellPowerEdge R510 Technical Guide 22The Power LED has two states:• Power LED is OFF: System is not operating, regardless of AC present. (Other AUX powered subsystemsmay be operational with AC power present.)• Power LED is ON (Green): System is operating. One or more of the non-standby (Vaux) power rails areactive.All PowerEdge servers include a green colored LED on the motherboard to indicate the presence of standbypower (Vaux). This LED is in a visible location for service personnel. Some server operating systems allowusers to configure the function of the power button through the ACPI feature.The system has the capability to remember the state of the Power button prior to AC loss (option selectedthrough BIOS setup). If this option is enabled via BIOS setup, system power returns to the state prior to ACloss with the resumption of AC.If the power button is disabled through system management mechanisms, the user can shut down the systemduring a crash (regardless of the Power button enable/disable settings).Table 6. Power Button Behavior under ACPI/Non-ACPI Operating SystemsAction ACPI OS w/ACPI EnabledNon-ACPI OS or ACPI OSw/ ACPI Disabled ACPI or Non-ACPI OSSystem Turned ON System Turned ON System Turned OFFPress and releasepower buttonSystem performs a gracefulshutdownSystem turns off BootsHold power button for6 secondsSystem turns off System turns off System starts and shuts down 6seconds later.4.3.4 Video Connector (Rack Systems)The video connector is used to attach a video graphics array (VGA)-compatible monitor to rack-basedsystems. Space around the connector accommodates full usage of it with all adjacent interfaces (USBconnectors, button, LED’s, etc.).4.3.5 USB ConnectorsUSB connectors are used to attach USB-compliant devices such as keyboards, mice, storage keys, andperipherals to the system. All PowerEdge systems have at least 2 front-accessible USB 2.0 compliant portsspaced to accommodate full usage of both connectors simultaneously with other front panel features (e.g.,Video connector, buttons, LEDs) without mechanical interference. These ports must be connected to thesame controller and cannot be shared with internal or back USB ports.For security, all external USB ports have an enable/disable function. Internal USB ports connected tointernal persistent storage devices have an enable/disable function independent of the other ports in thesystem.Except for platforms using chipsets that allow independent control to enable/disable each USB controller,disabling USB controllers observe the hierarchy detailed in Table 7 (listed from lowest to highest priority in a3-controller design).Table 7. USB Controller PrioritiesUSB Controller Function If disabled3 Front USB No other controller is disabled2 Back USB Controller 3 is disabled as well1 (Highest) Remote Access (RAC) Controllers 2 & 3 are disabled as well