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Chapter 4. Appliance physical interface
The physical interface for the appliance consists of buttons and LEDs on the front panel and ports and
LEDs on the back panel.
Front control panel
The power status and the hard disk drive and network activity of the appliance can be read from its front
control panel, as shown in the following figure.
Figure 8. Front panel buttons and LEDs for the appliance
Front panel buttons and LEDs
The front control panel provides the following buttons (preceded by the callout numbers from the
previous figure).
1. USB Ports
4. Reset button
Reboots the system. A needle, pin, or other small device is needed to activate this button and
reset the system.
6. Power button
Powers on or powers off the system. Turning off system power with this button removes the
main power but keeps standby power that is supplied to the system. Therefore, you must unplug
the system before servicing.
8. Unit Identification (UID) button
When depressed, illuminates the UID LED on the front panel as well as the system board UID
LED, which is visible at the rear of the system. Use these LEDs to locate the server within a rack.
Press again to turn off the LEDs.
The front panel also provides the following LEDs (preceded by the callout numbers from the previous
figure):
2. HDD activity LEDs (48 LEDs total)
Indicate the following possible statuses:
Table 3. HDD activity LEDs
Status
Offline or idle
Active
Fail
© Copyright IBM Corp. 2018
Green
Off
Flash
Off
Red
Off
Off
On
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