Storage Replica: Keep getting evet id 5015 follow by 5014

Wiehan Widjaja 1 Reputation point
2022-11-08T06:45:00.74+00:00

Hi,

I try to create storage replica between two data centre using cluster-to-cluster replication on premieses (async mode since Test-SRTopology give a warning for Network latency (8 millisecond). All other only information).

We recreate few times and still getting event ID: 5015 (successfully established a connection to a partner replica) and follow by event ID: 5014 (Connection lost to the share hosting the partner replica) -> based on this article we upgrade the RAM from 8 GB to 16 GB.

FYI: All servers are using Windows Server 2019 Standard with 2 vCPU, 16 GB, and the storage are using iSCSI (Data: 2TB, LOG: 2TB)

May I know how to resolve this issue.

Thanks and regards,
Wiehan

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2 answers

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  1. Limitless Technology 43,926 Reputation points
    2022-11-11T14:55:32.66+00:00

    Hi,

    I'm making the assumption that you're using DFS Replication here. If that is the case, I have seen this before in a system that I managed.

    TCP off loading was causing my issue. Please follow the steps below:

    Step 1)

    Disable RSS, NetDMA and TCP Offload

    1. Click Start, click Run, type regedit , and then click OK.
    2. Locate and then click the following registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

    EnableTCPA
    EnableTCPChimney
    EnableRSS

    Step 2) Turn off checksum offloading

    1. Click Start, click Run, type regedit , and then click OK.
    2. Locate and then click the following registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

    1. On the Edit menu, point to New, click DWORD Value, and then type DisableTaskOffload .
    2. Double-click DisableTaskOffload , type 1 , and then click OK.
    3. Exit Registry Editor.

    I hope this answers your question.

    -------------------------------------------------------------------------------------------------------------------------------------------------------

    --If the reply is helpful, please Upvote and Accept as answer--

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  2. Wiehan Widjaja 1 Reputation point
    2022-11-17T06:24:20.903+00:00

    Hi,

    Sorry for the late update.

    Currently I force to failover from one data center (PDC) to another data center (SDC) and failback to PDC, it resolve the issue but I am not able to failover within data center.

    Thanks and regards,
    Wiehan

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