IBM 7979B1U User Manual

Also see for 7979A1U: Specifications

Contents

Ethernet link LEDs: When these LEDs are lit, they indicate that there is an activelink connection on the 10BASE-T, 100BASE-TX, or 1000BASE-TX interface for theEthernet port.Ethernet connectors: Use either of these connectors to connect the server to anetwork.USB connectors: Connect a USB device, such as USB mouse, keyboard, or otherUSB device, to any of these connectors.Video connector: Connect a monitor to this connector. The video connectors onthe front and rear of the server can be used simultaneously.System-error LED: When this LED is lit, it indicates that a system error hasoccurred. An LED on the light path diagnostics panel is also lit to help isolate theerror.System-locator LED: Use this LED to visually locate the server among otherservers. You can use IBM Director to light this LED remotely.Power-on LED: When this LED is lit and not flashing, it indicates that the server isturned on. When this LED is flashing, it indicates that the server is turned off andstill connected to a power source. When this LED is off, it indicates that power isnot present, or the power supply or the LED itself has failed.Serial connector: Connect a 9-pin serial device to this connector. The serial port isshared with the baseboard management controller (BMC). The BMC can takecontrol of the shared serial port to perform text console redirection and to redirectserial traffic, using Serial over LAN (SOL).SAS connector: Connect a serial-attached SCSI (SAS) device to this connector.Server power featuresWhen the server is connected to a power source but is not turned on, the operatingsystem does not run, and all core logic except for the service processor (thebaseboard management controller or optional Remote Supervisor Adapter IISlimLine) is shut down; however, the server can respond to requests from theservice processor, such as a remote request to turn on the server. The power-onLED flashes to indicate that the server is connected to power but is not turned on.Turning on the serverApproximately 5 seconds after the server is connected to power, the power-controlbutton becomes active, and one or more fans might start running to provide coolingwhile the server is connected to power. You can turn on the server and start theoperating system by pressing the power-control button.The server can also be turned on in any of the following ways:v If a power failure occurs while the server is turned on, the server will restartautomatically when power is restored.v If your operating system supports the Wake on LAN feature, the Wake on LANfeature can turn on the server.Note: When 4 GB or more of memory (physical or logical) is installed, somememory is reserved for various system resources and is unavailable to the12 System x3650 Type 7979: User’s Guide