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40 IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide
Table 4–2 Ops Panel LED States
LED Definition Color Normal
Status
Fault
Status
Invalid
Address
Indicates that an invalid
Enclosure ID has been selected
or that the selection has
changed after Power On
Amber Off Flashing
Power On Enclosure Powered On Green On Off
System Fault System/SCM Fault Amber Off On
PSU/Cooling
Fault
PSU Cooling fault or enclosure
over-temperature.
Amber Off On
2Gb Link
Speed
Indicates link speed Green Off On
Hub Mode Not Used Green Off Off