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supplying adequate DC power to the system. During typical operation, both the ac
and dc power LEDs are lit. For any other combination of LEDs, see the Hardware
Maintenance Manual on the ThinkServer Documentation DVD.
Systems-management Ethernet connector: Use this connector to connect the
server to a network for systems-management information control. This connector is
active only if you have installed a Remote Supervisor Adapter II SlimLine, and it is
used only by the Remote Supervisor Adapter II SlimLine.
Ethernet activity LEDs: When these LEDs are lit, they indicate that the server is
transmitting to or receiving signals from the Ethernet LAN that is connected to the
Ethernet port.
Ethernet link LEDs: When these LEDs are lit, they indicate that there is an active
link connection on the 10BASE-T, 100BASE-TX, or 1000BASE-TX interface for the
Ethernet port.
Ethernet connectors: Use either of these connectors to connect the server to a
network.
USB connectors: Connect a USB device, such as USB mouse, keyboard, or other
USB device, to any of these connectors.
Video connector: Connect a monitor to this connector. The video connectors on
the front and rear of the server can be used simultaneously.
System-error LED: When this LED is lit, it indicates that a system error has
occurred. An LED on the light path diagnostics panel is also lit to help isolate the
error.
System-locator LED: Use this LED to visually locate the server among other
servers.
Power-on LED: When this LED is lit and not flashing, it indicates that the server is
turned on. When this LED is flashing, it indicates that the server is turned off and
still connected to a power source. When this LED is off, it indicates that power is
not 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 is
shared with the baseboard management controller (BMC). The BMC can take
control of the shared serial port to perform text console redirection and to redirect
serial traffic, using Serial over LAN (SOL).
SAS connector: Connect a serial-attached SCSI (SAS) device to this connector.
Server power features
When the server is connected to a power source but is not turned on, the operating
system does not run, and all core logic except for the service processor (the
baseboard management controller or optional Remote Supervisor Adapter II
SlimLine) is shut down; however, the server can respond to requests from the
service processor, such as a remote request to turn on the server. The power-on
LED flashes to indicate that the server is connected to power but is not turned on.
38 ThinkServer RD120 Types 6444, 6445, 6446, and 6447: Installation Guide