v Hot-swap hard disk drive status LEDs (some models): This LED is used on
SAS or SATA hard disk drives. When this LED is lit, it indicates that the drive has
failed. If an optional IBM ServeRAID controller is installed in the server, when this
LED is flashing slowly (one flash per second), it indicates that the drive is being
rebuilt. When the LED is flashing rapidly (three flashes per second), it indicates
that the controller is identifying the drive.
Rear view
Note: The illustrations in this document might differ slightly from your hardware.
The following illustration shows the LEDs and connectors on the rear of the fixed
power-supply model.
Power-cord
connector
USB 1-2 connector
USB 3-4 connector
Serial
connector
Video
connector
Ethernet 1
activity LED
Ethernet 1
link LED
Ethernet 2
activity LED
Ethernet 2
link LED
PCI slot 1
PCI slot 2
AC Power LED
(green)
DC Power LED
(green)
Power-supply
error LED
(amber)
NMI button
The following illustration shows the LEDs and connectors on the rear of the
redundant power-supply model.
AC
DC
AC
DC
Power-cord
connector
USB 1-2 connector
USB 3-4 connector
Serial
connector
Video
connector
Ethernet 1
activity LED
Ethernet 1
link LED
Ethernet 2
activity LED
Ethernet 2
link LED
PCI slot 1
PCI slot 2
AC Power LED
(green)
DC Power LED
(green)
Power-supply
error LED
(amber)
NMI button
v 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.
v Ethernet activity LEDs: When these LEDs are lit, they indicate that there is
activity between the server and the network.
v AC power LED: This LED is used on power supply with Active Energy Manager
(AEM). This green LED provides status information about the power supply.
During typical operation, both the ac and dc power LEDs are lit. For any other
combination of LEDs, see the Problem Determination and Service Guide on the
IBM System x Documentation CD.
v DC power LED: This LED is use on power supply with AEM. This green LED
provides status information about the power supply. During typical operation, both
Chapter 1. The System x3250 M4 server 13