System LEDs

IBM® uses light emitting diodes (LEDs) to indicate the status of various components and the overall system.

Table 1 describes the system LEDs for the IBM c-type SAN directors.
Table 1. IBM c-type SAN switches and directors system LEDs
LED Status Description

PSU

Green

Power® supply units are operational.

Amber

One of the following problems is indicated.

  • Any power supply unit LED is red.
  • Any power supply unit is down.  

FAN

Green

Fan modules are operational.

Amber

At least one I/O module has a red STATUS LED.

SUP

Green

Supervisor modules are operational.

Amber

At least one I/O module has a red STATUS LED.

FAB

Green

Fabric modules are operational.

Amber

At least one I/O module has a red STATUS LED.

IOM

Green

Switching modules are operational.

Amber

At least one I/O module has a red STATUS LED.