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Fault
Amber LED: controller fault
Normal status: Off
Problem status: On
Power
Green LED: power is on
Normal status: On
Problem status: Off
Heartbeat
Green LED: controller working
Normal status: On (blinking)
Problem status: On
Status
(8 LEDs including the Heartbeat)
Green LEDs: controller status
Reset switch
Controller B
GS000053a
Controller A
Controller LEDs
Table 18 describes the DS4500 Controller LEDs.
Table 18. Controller LEDs
LED Color Normal status Problem status
Possible conditions indicated by the
problem status
1
Power Green On Off
v There is no power to the storage subsystem.
v The cables are loose or the switches are off.
v The power supply has failed, is missing, or
is not fully seated.
v The temperature of the DS4500 is too high.
Fault
3
Amber Off On Controller failure
Heartbeat Green Blinking Not blinking No controller activity
Status (seven
3
LEDs not
including
Heartbeat)
Green All LEDs are off
except the
heartbeat
2
Various patterns
depending on
the condition
2
If any status LEDs are lit and the controller is
not offline, there is a memory fault indicating
that the controller CRU has failed.
1
Always use the storage-management software to identify the failure.
2
There are eight LEDs (the Heartbeat and seven others); the seven others are lit in various patterns, depending on
the controller status. For details on these common patterns, see Table 19 on page 130.
3
If the controller is offline, all of the LEDs will be lit. This does not indicate failure.
Figure 89. Controller LEDs
Chapter 4. Operating the storage subsystem 129