Dell Unity: Software Upgrade Fails Due to Health Check Error "check_replication"

Summary: A Dell Unity software upgrade fails with 'Health Check Error:check_replication_health_2, check_replication_health_5'. The software update could also fail with 'Warning: check_replication_health_4'. ...

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Symptoms

Upgrade Health Check messages and Events Alert:

The health check has failed. One or more remote system problems were detected on the system and causes the upgrade to fail. Record the error code and search the Dell Online Support website for available support options.
[Error Code: platform::check_replication_health_2]

-------------------------------------Errors-------------------------------------
Platform: Check replication health
Sync is in progress for the following replication sessions:
         * VRT_xxxx_xx
Action : Cannot perform upgrade while a sync is in progress for a
         replication session. Please wait until the sync completes or pause the
         sessions and retry the upgrade.
ERROR_CODE=platform::check_replication_health_5|Error|VRT_xxxx_xx


Events > Alerts > Information: 
The remote system connection is out of date. Update the connection with the latest interface changes.

Warnings
One or more replication sessions are configured to be auto-synchronized. This could cause a problem during an upgrade. Pause the replication sessions prior to starting the upgrade and resume them after completing the upgrade. 
[Warning Code=platform::check_replication_health_4]


/nas/log/check_health.161031-152020.log
------------------------------------Warnings------------------------------------
Platform: Check replication health
The following replication sessions should be paused prior to starting the upgrade:
         * rep_sess_res_84_res_1_FNMxxxxxxxxxxx_FNMxxxxxxxxxxx
         * rep_sess_res_85_res_2_FNMxxxxxxxxxxx_FNMxxxxxxxxxxx
Action : Since these are auto-synchronized sessions, they could get  into critical state if replication attempts a sync during the upgrade.  To avoid this issue, please pause these sessions before starting the upgrade and resume them after the upgrade.

ERROR_CODE=platform::check_replication_health_4|Warning|rep_sess_nas_44_nas_1_FNMxxxxxxxxxxx_FNMxxxxxxxxxxx
* rep_sess_res_84_res_1_FNMxxxxxxxxxxx_FNMxxxxxxxxxxx
* rep_sess_res_85_res_2_FNMxxxxxxxxxxx_FNMxxxxxxxxxxx
-------------------------------------Errors-------------------------------------
Platform: Check replication health
The following remote systems have health problems:
         * FNMxxxxxxxxxxx
Action : Escalate this issue through your support organization and provide this output in your escalation.
ERROR_CODE=platform::check_replication_health_2|Error|FNMxxxxxxxxxxx
--------------------------------------------------------------------------------
UPGRADE CANNOT PROCEED.
Check Result: Error


spb:~$ uemcli /remote/sys -id RS_1 show -detail |grep Health
      Health state                 = Minor failure (15)
      Health details               = "Update the remote system connection to pick up the latest interface changes on the local and remote systems."



Unisphere > Replication > Connections

Hovering by the Warning triangle shows: 

"Update the remote system connection to pick up the latest interface changes on the local and remote systems."

Cause

For a Health Check failure, the underlying cause is typically an outdated replication connection between the two replication systems. Replication connections must be manually refreshed whenever a Storage Processor (SP) is rebooted or the system Management Service is restarted.

For a Health Check warning, active replication sessions on the source NAS Server or its associated file systems can prevent the health check from completing successfully. In these cases, the replication sessions must be paused on the source system before proceeding.

Note: Pausing replication on the source side automatically changes the replication state on the destination side to Paused.

Resolution

The required action depends on whether the health check reports a Warning or an Error.

Health Check Warning
Pause all replication sessions on the source system, which will automatically pause the corresponding sessions on the destination system.

Unisphere: Replication > Sessions > More Actions > Pause

Note: Pausing a replication session on the source system automatically changes the state of the corresponding destination session to Paused.

Health Check Error
Update the replication connection between the source and destination systems.

 

Unisphere: Replication > Connections > Verify and Update
After the update completes successfully, the connection status should display a green check mark, indicating that the replication connection is healthy and up to date.

Additional Information


Affected Products

Dell EMC Unity, Dell Unity 450F DC, Dell Unity 300, Dell Unity 300 DC, Dell EMC Unity 300F, Dell EMC Unity 350F, Dell Unity 350F DC, Dell EMC Unity XT 380, Dell EMC Unity XT 380F, Dell EMC Unity 400, Dell Unity 400 DC, Dell EMC Unity 400F , Dell EMC Unity 450F, Dell EMC Unity XT 480, Dell EMC Unity XT 480F, Dell EMC Unity 500, Dell EMC Unity 500F, Dell EMC Unity 550F, Dell EMC Unity 600, Dell EMC Unity 600F, Dell EMC Unity 650F, Dell EMC Unity XT 680, Dell EMC Unity XT 680F, Dell EMC Unity XT 880, Dell EMC Unity XT 880F, Dell EMC Unity Family |Dell EMC Unity All Flash, Dell EMC Unity Hybrid ...
Article Properties
Article Number: 000058805
Article Type: Solution
Last Modified: 07 Jul 2026
Version:  8
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