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1: Storage System Features
Front Panel LEDs
The Enclosure System Interface/Operators (ESI/Ops) panel consists of three status
indicator LEDs that are located on the front of the enclosure. The ESI/Ops panel provides
the enclosure with a micro controller that is used to monitor and control all elements of
the enclosure. Each element (system, power, and cooling status) is interfaced to the
processor. Figure 1-4 shows the ESI/Ops panel.
Figure 1-4
ESI/Ops Panel
Table 1-1 summarizes the functions of the LEDs on the ESI/Ops panel. See Chapter 4 for
descriptions of common problems, with possible solutions, that can occur with your SGI
TP900 system.
Table 1-1
ESI/Ops LED States
LED
LED State and Meaning
System status
Green signifies that power is applied to the enclosure.
Amber signifies that the ESI processor has failed.
Power status
Green signifies that the power supplies are functioning normally.
Amber signifies that there is a PSU failure in a dual-PSU enclosure.
In the event of a PSU failure in a single-PSU enclosure, all LEDs are off.
Cooling status
Green signifies that all fans are functioning normally.
Amber signifies that there is a fan failure.
System status
Cooling status
Power status
Summary of Contents for TP900
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