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Passive BlockMode lost during Log Backup

Chris 656 Reputation points
2021-02-14T10:29:12.387+00:00

hello

we use two Exchange 2016 with a DAG.

every hour during log backup (netbackup with Snapshot technologie) we get an error under Exchange - HigAvailability - BlockReplication

Passive BlockMode for database xxx failed to read data. Active was EX2. Error: Microsoft.Exchange.Cluster.Replay.NetworkEndOfDataException: Communication was terminated by server 'EX2': Data could not be read because the communication channel was closed..

It's only for 15-20sec. should we ignore this.

can we improve something

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Andy David - MVP 150.3K Reputation points MVP
    2021-02-14T13:02:20.117+00:00

    If its happening just during backups, I would not be too concerned. Exchange will fall back to file-mode replication in those cases. As long as it recovers and the database copies show healthy, it will be fine

    https://learn.microsoft.com/en-us/exchange/high-availability-and-site-resilience-exchange-2013-help
    https://thoughtsofanidlemind.com/2011/03/16/block-mode-replication/

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