Hardware Overview
48
System Hardware Guide
Front Panel
System power on
Reboot the system
Power on indicator
Figure 14: Front panel operations functions and indicators
System ready
ALERT status
Rack screw
OK
The upper right corner of the front panel has all of the front-panel interfaces (except for the disk
activity LEDs). See Figure 14.
At the top is the system power on button.
Caution
Below the power button is a very small button labelled RESET. The button immediately
reboots the system. Do not press RESET unless instructed to by Data Domain Technical
Support.
Table 11: Front panel LEDs
LED
State
Power-on Indicator
The LED is the power on indicator that glows green when power is on.
System Status Indicator
The LED glows steadily green when the system is finished booting up and is in
normal working mode.
The LED blinks on and off when something in the system is degraded, such as
when some memory is bad, one or more fans have failed, or a power supply has
failed.
The LED is off during system boot up and when the ALERT LED is active.
