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
● No action is required.
109 Info. The statistics for the indicated volume have been reset.
Recommended actions:
● No action is required.
110 Info. Ownership of the indicated disk group has been given to the other controller.
Recommended actions:
● No action is required.
111 Info. The link for the indicated host port is up.
This event indicates that a problem reported by event 112 is resolved. For a system with FC
ports, this event also appears after loop initialization
Recommended actions:
● No action is required.
112 Warning The link for the indicated host port has unexpectedly gone down. This can affect host mappings.
Recommended actions:
● Look for corresponding event 111 and monitor excessive transitions indicating a host-
connectivity or switch problem. If this event occurs more than 8 times per hour, it should be
investigated.
● This event is probably caused by equipment outside of the storage system, such as faulty
cabling or a faulty switch.
● If the problem is not outside of the storage system, replace the controller module that logged
this event.
Info. The link for the indicated host port has gone down because the controller is starting up.
Recommended actions:
● No action is required.
114 Info. The link for the indicated disk-channel port is down. Note that events 114 and 211 are logged
whenever a user-requested rescan occurs and do not indicate an error.
Recommended actions:
● Look for corresponding event 211 and monitor excessive transitions indicating disk problems.
If more than 8 transitions occur per hour, see Troubleshooting and problem solving on page
30.
116 Error After a recovery, the partner controller was killed while mirroring write-back cache data to
the controller that logged this event. The controller that logged this event restarted to avoid
losing the data in the partner controller’s cache, but if the other controller does not restart
successfully, the data will be lost.
Recommended actions:
● To determine if data might have been lost, check whether this event was immediately
followed by event 56 (Storage Controller booted up), closely followed by event 71 (failover
started). The failover indicates that the restart did not succeed.
117 Warning This controller module detected or generated an error on the indicated host channel.
Recommended actions:
● Restart the Storage Controller that logged this event.
● If more errors are detected, check the connectivity between the controller and the attached
host.
● If more errors are generated, shut down the Storage Controller and replace the controller
module.
118 Info. Cache parameters have been changed for the indicated volume.
Events and event messages 85