Module Leds - Dell EMC PowerVault ME4 Series Deployment Manual

Controller module or IOM LEDs
• For information about controller module LEDs, see
• For information about expansion module LEDs, see
Temperature sensors
Temperature sensors throughout the enclosure and its components monitor the thermal health of the storage system. Exceeding the
limits of critical values causes a notification to occur.

Module LEDs

Module LEDs pertain to controller modules and IOMs.
Controller module LEDs
Use the controller module LEDs on the face plate to monitor the status of a controller module.
Table 18. Controller module LED states
CRU OK (Green) CRU Fault
(Amber)
On Off
Off On
Blinking
Actions:
• If the CRU OK LED is blinking, wait for the system to boot.
• If the CRU OK LED is off, and the controller module is powered on, the module has failed.
• Check that the controller module is fully inserted and latched in place, and that the enclosure is powered on.
• Check the event log for specific information regarding the failure.
• If the CRU Fault LED is on, a fault condition is detected.
• Restart the controller module from the partner controller module using the ME Storage Manager or CLI.
• If the restart does not resolve the fault, remove the controller module and reinsert it.
• If the previous actions do not resolve the fault, contact your supplier for assistance. Controller module replacement may be necessary.
IOM LEDs
Use the IOM LEDs on the face plate to monitor the status of an IOM .
Table 19. IOM LED states
CRU OK (Green) CRU Fault
(Amber)
On Off
Off On
Controller module
IOM LEDs.
External host port
activity (Green)
Off
On
Blinking
External host port
activity (Green)
Off
On
Blinking
LEDs.
Status
Controller module OK
Controller module fault – see "Replacing a controller module" in the
Dell EMC PowerVault ME4 Series Storage System Owner's
Manual
No external host port connection
External host port connection – no activity
External host port connection – activity
System is booting
Status
Controller module OK
IOM module fault – see "Replacing an IOM" in the Dell EMC
PowerVault ME4 Series Storage System Owner's Manual
No external host port connection
HD mini-SAS port connection – no activity
HD mini-SAS port connection – activity
Troubleshooting and problem solving 67