The VHD containing the replica or one of it's snapshots could not be mounted or unmounted DPM 2016 UR4 RRS feed

  • Question

  • I found another thread on this but thought I'd start this as the other was very long and hadn't been updated in a while. I got a lot of critical and warning errors as a result of the following:

    Creation of recovery points for C:\ on <FQDN> have failed. The last recovery point creation failed for the following reason: (ID: 3114)
    The VHD containing the replica or one of it's snapshots could not be mounted or unmounted. (ID: 40002)

    This seems to be a result of high memory usage which has not been completely resolved.

    I'm using DPM 2016 UR4. Worryingly, around the same time I found delayed write failed errors and 'The system failed to flush data to the transaction log. Corruption may occur in VolumeId:' errors in the event log as well as 'Unexpected failure. Error code: 2@01010013' from the VDS Basic Provider.

    You may also need to tune some ReFs parameters to get the best overall results.
    Friday, January 12, 2018 11:24 AM


  • house keeping - closing old post.

    1) Add these registry settings.  Copy / paste into notepad and save as ReFs.reg (no .txt extension) - then right-click the ReFs.reg and click merge.

    Windows Registry Editor Version 5.00



    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft Data Protection Manager\Configuration\DiskStorage]

    "High Threshold On Client Objects (B)"="60000000"
    "High Threshold On Events (B)"="60000000"

    2) Increase the WMI MemoryPerHost setting.

    a. Start “wbemtest” as administrator.
    b. Connect to the “root” namespace (not “root\default”, just “root”)
    c. Click Open Instance. Specify “__ProviderHostQuotaConfiguration=@”
    d. Select Local Only for easier readability. You will see the threshold values.
    e. Increase the MemoryPerHost 1073741824
    f. Save Property
    g. Save Object
    h. Click Exit.

    3) Reboot the DPM / MABS Server.

    Mike Jacquet

    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    Friday, January 10, 2020 9:27 PM