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
NOTE: It is normal for this event to be logged as Informational severity during firmware
update.
Recommended actions:
● Check the version of the controller firmware and update to the latest firmware if needed.
● If the latest firmware is already installed, no action is required.
153 Info. The Management Controller (MC) has re-established communication with the Storage Controller
(SC).
Recommended actions:
● No action is required.
156 Warning The Management Controller (MC) has been restarted from the Storage Controller (SC) for the
purpose of error recovery.
Recommended actions:
● See the recommended actions for event 152, which is logged at approximately the same
time.
Info. The Management Controller (MC) has been restarted from the Storage Controller (SC) in a
normal case, such as when initiated by a user.
Recommended actions:
● No action is required.
157 Error A failure occurred when trying to write to the Storage Controller (SC) flash chip.
Recommended actions:
● Replace the controller module that logged this event.
158 Error A correctable ECC error occurred in Storage Controller CPU memory more than once during a
12-hour period, indicating a probable hardware fault.
Recommended actions:
● Replace the controller module that logged this event.
Warning A correctable ECC error occurred in Storage Controller CPU memory.
This event is logged with Warning severity to provide information that may be useful to technical
support, but no action is required now. It will be logged with Error severity if it is necessary to
replace the controller module.
Recommended actions:
● No action is required.
161 Info. One or more enclosures do not have a valid path to an enclosure management processor (EMP).
All enclosure EMPs are disabled.
Recommended actions:
● Download the debug logs from your storage system and contact technical support. A service
technician can use the debug logs to determine the problem.
162 Warning The host WWNs (node and port) previously presented by this controller module are unknown. In
a dual-controller system this event has two possible causes:
● One or both controller modules have been replaced or moved while the system was powered
off.
● One or both controller modules have had their flash configuration cleared (this is where the
previously used WWNs are stored).
The controller module recovers from this situation by generating a WWN based on its own serial
number.
Recommended actions:
Events and event messages 87