IBM System x3250 M4 Installation & User Manual

Also see for System x3250 M4: Product guide At-a-glance guide At-a-glance guide Product guide

Contents

IBM System x3250 M4 Installation & User Manual Manual pdf 32 page image

the ac and dc power LEDs are lit. For any other combination of LEDs, see theProblem Determination and Service Guide on the IBM System x DocumentationCD.v Power-supply error (!) LED: When this yellow LED is lit, it indicates that thepower supply has failed. For any other combination of LEDs, see the ProblemDetermination and Service Guide on the IBM System x Documentation CD.v Power cord connector: Connect the power cord to this connector.v Video connector: Connect a monitor to this connector.v Serial connector: Connect a 9-pin serial device to this connector. The serial portis shared with the integrated management module II (IMM2). The IMM2 can takecontrol of the shared serial port to redirect serial traffic, using Serial over LAN(SOL).v USB connectors: Connect a USB device, such as a USB mouse, keyboard, orother device to any of these connectors.v Ethernet connectors: Use either of these connectors to connect the server to anetwork. When you use the Ethernet 1 connector, the network can be sharedwith the IMM2 through a single network cable.v NMI button: Press this button to force a nonmaskable interrupt to themicroprocessor. You might have to use a pen or the end of a straightened paperclip to press the button. It allows you to blue screen the server and take amemory dump (use this button only when directed by the IBM service support).Server power featuresWhen the server is connected to an ac power source but is not turned on, theoperating system does not run, and all core logic except for the integratedmanagement module II is shut down; however, the server can respond to requeststo IMM2, such as a remote request to turn on the server. The power-on LEDflashes to indicate that the server is connected to ac power but is not turned on.Turning on the serverApproximately 1 to 3 minutes after the server is connected to ac power, thepower-control button becomes active (the power-on LED flashes slowly), and one ormore fans might start running to provide cooling while the server is connected topower. You can turn on the server 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 theoperating system. The amount of memory that is reserved for systemresources depends on the operating system, the configuration of the server,and the configured PCI devices.Turning off the serverWhen you turn off the server and leave it connected to ac power, the server canrespond to requests to IMM2, such as a remote request to turn on the server. Whilethe server remains connected to ac power, one or more fans might continue to run.To remove all power from the server, you must disconnect it from the power source.14 IBM System x3250 M4 Type 2583: Installation and User’s Guide