Connecting the cablesThe following illustration shows the locations of the input and output connectors onthe front of the server.Power-on LEDPower-control buttonReset buttonHard disk drive activity LEDLocator LEDSystem-error LEDUSB 1 connectorUSB 2 connector Hard disk drive statusLED (amber)Hard disk drive activityLED (green)The following illustration shows the locations of the input and output connectors onthe rear of the server.Power-cordconnectorUSB 1-2 connectorUSB 3-4 connectorSerialconnectorVideoconnectorEthernet 1activity LEDEthernet 1link LEDEthernet 2activity LEDEthernet 2link LEDNMI buttonPCI slot 1 PCI slot 2You must turn off the server before you connect or disconnect cables.See the documentation that comes with any external devices for additional cablinginstructions. It might be easier for you to route cables before you connect thedevices to the server.Cable identifiers are printed on the cables that come with the server and optionaldevices. Use these identifiers to connect the cables to the correct connectors.Updating the server configurationWhen you start the server for the first time after you add or remove a device, youmight receive a message that the configuration has changed. The Setup utilitystarts automatically so that you can save the new configuration settings.Some optional devices have device drivers that you must install. For informationabout installing device drivers, see the documentation that comes with each device.If the server has an optional RAID adapter and you have installed or removed ahard disk drive, see the documentation that comes with the RAID adapter forinformation about reconfiguring the disk arrays.Note: If the server is configured for RAID operation using a ServeRAID adapter,you might have to reconfigure your disk arrays after you install hard diskdrives. See the ServeRAID adapter documentation for additional informationabout RAID operation and complete instructions for using the ServeRAIDadapter.For information about configuring the integrated Gigabit Ethernet controller, see“Configuring the Gigabit Ethernet controller” on page 70.56 IBM System x3250 M3 Types 4251, 4252, and 4261: Installation and User’s Guide