slowly (one flash per second), it indicates that the drive is being rebuilt as part of a
RAID configuration. When the LED is flashing rapidly (three flashes per second), it
indicates that the controller is identifying the drive.
CD/DVD-eject button: Press this button to release a CD or DVD from the
CD-RW/DVD drive.
CD/DVD drive activity LED: When this LED is lit, it indicates that the CD-RW/DVD
drive is in use.
Rack release latches: Press these latches to release the server from the rack.
Rear view
The following illustration shows the connectors and LEDs on the rear of the server.
Attention: In a dc power environment, see the documentation that comes with
the dc power supply for information about the power-supply LEDs.
1 Power cord connector 1 11 Ethernet connector 2
2 AC power LED 12 USB connector 2
3 DC power LED 13 USB connector 1
4 Power supply filler panel 14 Video connector
5 Systems-management Ethernet
connector
15 System-error LED
6 Ethernet activity LEDs 16 System-locator LED
7 Ethernet link LEDs 17 Power-on LED
8 Ethernet connector 1 18 Serial connector
9 USB connector 4 19 SAS connector
10 USB connector 3 20 Power supply 1
Power-cord connector (ac power supply only): Connect the power cord to this
connector.
Attention: In a dc power environment, only trained service personnel other than
Lenovo service technicians are authorized to connect or disconnect power to the dc
power supply. See the documentation that comes with each dc power supply.
AC power LED: Each hot-swap power supply has an ac power LED and a dc
power LED. When the ac power LED is lit, it indicates that sufficient power is
coming into the power supply through the power cord. During typical operation, both
the ac and dc power LEDs are lit. For any other combination of LEDs, see
“Power-supply LEDs” on page 167.
DC power LED: Each hot-swap power supply has a dc power LED and an ac
power LED. When the dc power LED is lit, it indicates that the power supply is
Chapter 1. Introduction 7
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