Unable to perform item level recovery on some converted VHD to VHDX files RRS feed

  • Question

  • Hi

    We run a 2012 R2 failover cluster with 2 Hyper-V hosts and we use DPM 2012 R2 to do VM backup's.

    When moving machines from the old 2008 R2 failvoer cluster to the new 2012 R2 cluster, many of the VHD files were also converted to VHDX.

    It seem's that for many of those we can't do ILR in DPM and browse those VHDX files. All 2003 VM's are affected and many but not all the 2008 R2 VM's. All 2012 R2 VM's Work fine. All 2003 and 2008 R2 VM's taht didn't have their VHD files converted to VHDX, also Work fine.

    I checked those suggestions that the error (ID 958) provides and its not because of the use of dynamic disks inside the VM or any of the other suggestions. The only suggestion we dont comply with is that Hyper-V role is not intalled on the DPM server, as the error suggests that we do. But i believe this is not nessesary with Server 2012 R2 and DPM 2012 R2 and since we can open some and other's not, it can't be because of missing Hyper-V role and the functionality to open VHD/VHDX files.

    We also tried the suggestion to change the registry value for FsDepends, Start DWORD from 3 to 0.

    Has anyone else experienced this and found a solution ?

    Best Regards


    Tuesday, January 26, 2016 5:51 PM

All replies

  • Hi Martin,

    Its a tricky question!

    In case you are using differencing disks. Can you verify that the Diff VHD and Base VHD are on different volumes?
    This is one of the few requirements to perform ILR:

    Recover Hyper-V and virtual machines

    Kind Regards
    Markus Eliasson

    Thursday, January 28, 2016 9:08 AM
  • Hi Markus

    Yes, we use a SAN with just 2 volumes

    One small for witness disk and one large for the VM's. Configuration files, VHD, VHDX, AVHD ect. Are all placed on that volume for all our VM's

    Best Regards


    Thursday, January 28, 2016 10:43 AM