Deployment Guide
• 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 20. IOM LED states
CRU OK (Green) CRU Fault
(Amber)
External host port
activity (Green)
Status
On Off Controller module OK
Off On IOM module fault – see “Replacing an IOM” in the Dell EMC
PowerVault ME4 Series Storage System Owner’s Manual
Off No external host port connection
On HD mini-SAS port connection – no activity
Blinking HD mini-SAS port connection – activity
Blinking EBOD VPD error
Actions:
• If the CRU OK LED is off, and the IOM is powered on, the module has failed.
○ Check that the IOM 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 this IOM using the PowerVault Manager or CLI.
○ If the restart does not resolve the fault, remove the IOM and reinsert it.
• If the previous actions do not resolve the fault, contact your supplier for assistance. IOM replacement may be necessary.
Troubleshooting 2U enclosures
Common problems that may occur with your 2U enclosure system.
The Module Fault LED on the Ops panel, described in Figure 30. Ops panel LEDs—2U enclosure front panel on page 67, lights amber to
indicate a fault for the problems listed in the following table:
NOTE: All alarms also report through SES.
Table 21. Troubleshooting 2U alarm conditions
Status Severity Alarm
PCM alert – loss of DC power from a single PCM Fault – loss of redundancy S1
PCM fan fail Fault – loss of redundancy S1
SBB module detected PCM fault Fault S1
PCM removed Configuration error None
Enclosure configuration error (VPD) Fault – critical S1
Low warning temperature alert Warning S1
High warning temperature alert Warning S1
Over-temperature alarm Fault – critical S4
I
2
C bus failure Fault – loss of redundancy S1
Ops panel communication error (I
2
C) Fault – critical S1
RAID error Fault – critical S1
SBB interface module fault Fault – critical S1
76 Troubleshooting and problem solving