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Table 22. Behavior of system status LED of the utility node (continued)
LED type
LAN 1 and LAN 2
ID
Warning
M.2 SSD
Power supply unit (PSU) LEDs
These LEDs on the rear of the enclosure are used to monitor the power supply units (PSUs) of the utility
node.
The following figure highlights the location of the status LEDs of PSU 0 and PSU 1.
Figure 50. PSU status LEDs of the utility node
Important: All PSUs must be AC on at the same time before you power on the system.
The PSUs have LEDs to indicate their status, as described in the following figure and table.
Figure 51. Close view of the PSU LEDs in the rear of the enclosure of the utility node
72 IBM Storage Scale System Utility Node: Hardware Planning and Installation Guide
Color
Green
Blue
Red
Green
Behavior
Off
Solid on
Blinking
Off
Solid on
Off
On
Blinking
Solid on
Offline.
Linking.
Access.
Normal.
Located.
System is working
normally.
Indicates one or more of
the following:
• Memory warning
• PSU warning
• Fan warning
• System fault
SSD activity.
An SSD is present.
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