Chapter 3: Subsystem Monitoring

3.2.5 BBU Module LED

The BBU module has an LED on its faceplate. (See Figure 3-5) The function is the same as the similar LED on the controller module. The LED is off when the BBU is functioning normally and is able to sustain the cache memory. The LED flashes to indicate the BBU is charging. If the LED is illuminating amber, the BBU may have lost its ability to hold electrical charge. You should then contact your vendor to verify the problem.

Figure 3-5: BBU Module LED

3.2.6 PSU LEDs

Each PSU comes with a single LED at the back (see Figure 3-6), located close to the power switch that turns on the subsystem. This LED indicates the operational status of the PSU module. Please refer to the PSU LED definitions shown in Table 3-6.

 

 

Figure 3-6: PSU Module LED

 

 

 

Color

 

Status

 

 

 

Steadily

 

The power supply has not been turned on. The PSU

Blinking

 

module LED will blink when the subsystem is

Green

 

connected to a power source but not yet turned on.

 

 

 

Static Green

 

The PSU is operating normally and experiencing no

 

 

problem.

 

 

 

Static Red

 

The PSU has failed and is unable to provide power to

 

 

the subsystem.

 

 

 

OFF

 

The PSU is not turned on and the power cord is

 

 

disconnected.

 

 

 

 

Table 3-6: PSU Module LED Definitions

 

 

 

Status-indicating LEDs

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