Owners Manual
Table Of Contents
- Dell EMC PowerVault ME4 Series Storage System Owner’s Manual
- Contents
- Storage system hardware
- Troubleshooting and problem solving
- Module removal and replacement
- ESD precautions
- Dealing with hardware faults
- Firmware updates
- Continuous operation during replacement
- Shutting down attached hosts
- Shutting down a controller module
- Verifying component failure
- Customer-replaceable units (CRUs)
- Attach or remove the front bezel of a 2U enclosure
- Replacing a drive carrier module in a 2U enclosure
- Replacing a DDIC in a 5U enclosure
- Replacing a controller module or IOM in a 2U or 5U enclosure
- Replacing a power supply unit (PSU) in a 5U enclosure
- Replacing a fan cooling module (FCM) in a 5U enclosure
- Replacing a power cooling module (PCM) in a 2U enclosure
- Completing the component installation process
- Verifying component operation
- Performing updates in PowerVault Manager after replacing an FC or SAS HBA
- Events and event messages
- Connecting to the CLI port using a serial cable
- Technical specifications
- Standards and regulations
Table 27. Event descriptions and recommended actions (continued)
Number Severity Description/Recommended actions
● To allow the replication to proceed, resolve the problem that is preventing access to the
secondary volume.
476 Warning The CPU temperature exceeded the safe range so the CPU entered its self-protection state.
IOPS were reduced.
The storage system is operational but I/O performance is reduced.
Recommended actions:
● Check that the storage system’s fans are running.
● Check that the ambient temperature is not too warm. The controller enclosure operating
range is 5°C to 35°C (41°F to 95°F). The expansion enclosure operating range is 5°C to
40°C (41°F to 104°F).
● Check for any obstructions to the airflow.
●
Check that there is a module or blank plate in every module slot in the enclosure.
● If none of these recommended actions resolve the issue, replace the controller module that
logged the error.
When the problem is resolved, event 478 is logged.
477 Info. The CPU temperature exceeded the normal range so the CPU speed was reduced. IOPS were
reduced.
The storage system is operational but I/O performance is reduced.
Recommended actions:
● Check that the storage system’s fans are running.
● Check that the ambient temperature is not too warm. The controller enclosure operating
range is 5°C to 35°C (41°F to 95°F). The expansion enclosure operating range is 5°C to
40°C (41°F to 104°F).
● Check for any obstructions to the airflow.
●
Check that there is a module or blank plate in every module slot in the enclosure.
● If none of these recommended actions resolve the issue, replace the controller module that
logged the error.
When the problem is resolved, event 478 is logged.
478 Info. A problem reported by event 476 or 477 is resolved.
Recommended actions:
● No action is required.
479 Error The controller reporting this event was unable to flush data to or restore data from non-volatile
memory.
This mostly likely indicates a CompactFlash failure, but it could be caused by some other problem
with the controller module. The Storage Controller that logged this event will be killed by its
partner controller, which will use its own copy of the data to perform the flush or restore
operation.
Recommended actions:
● If this is the first time this event has been logged, restart the killed Storage Controller.
● If this event is then logged again, replace the CompactFlash.
● If this event is then logged again, shut down the Storage Controller and replace the
controller module.
480 Error An IP address conflict was detected for the indicated iSCSI port of the storage system. The
indicated IP address is already in use.
Recommended actions:
● Contact your data-network administrator to help resolve the IP address conflict.
481 Error The periodic monitor of CompactFlash hardware detected an error. The controller was put in
write-through mode, which reduces I/O performance.
Events and event messages 117