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I'm using several Windows Server 2019 Clusters (e. g. Hyper-V, File Server). On all machines that have clustered roles, I get the following errors (with different harddisk numbers):

Log Name: System
Source:   Disk
Event ID: 11
Level:    Error
Message:  The driver detected a controller error on \Device\Harddisk1\DR1.

From my observations, I can conclude, that the error is always thrown on harddisks that are currently offline on one cluster member, because they are online on another cluster member. So it happens on disks that are used by cluster roles for data and disk witness in quorum.

I'm not sure, if that's just ok in this case and that I can ignore those errors or if there is some misconfiguration and something has to be fixed.

Can someone confirm, that this is normal behaviour or that something might be broken?

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  • Seeing the same here. It also appears to go away when anti-virus (Sophos in our case) is turned off.
    – Brian
    May 14 at 15:53
  • I have Microsoft Defender Antivirus enabled. Turning it off is not an option for me. Did you find tolerable exclusions for your anti-virus? May 14 at 20:33
  • I have not found exclusions that work yet and only turned antivirus off temporarily for testing.
    – Brian
    May 14 at 20:47
  • Have you reviewed the list of exclusions specifically for clustering? docs.microsoft.com/en-us/microsoft-365/security/…
    – SamErde
    May 19 at 11:51
  • 1
    No, no solution to this so far. Aug 15 at 7:53

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