Hardware Overview
66
System Hardware Guide
Power Supply LEDs
Figure 27: Power unit LEDs
LED locations
A system has three power supply units. Each power unit has an LED (see Figure 27) that glows
green when the unit is functional. The LED glows amber if the unit has failed, but still has power.
The LED also glows amber when the system is turned off but the unit is still plugged in to a live
power source. The LED is dark if the unit has no power. Also, when a unit fails, the power supply
failure LED on the
front
panel of the system glows red (see Figure 24 on page 64).
Hardware Interface
The hardware interface panel is where you connect to a Data Domain system with a serial console,
a monitor and keyboard, or through an Ethernet connection. See Figure 28 on page 67. The
Ethernet interfaces eth0 and eth1 are for data transfer to the system or for administrative access
over a network. Both Ethernet interfaces are 1000 Base-T Gigabit copper ports that can accept
10/100 Base-T or Gigabit connections.
