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How to expand vhdx disk VM on failover cluster RRS feed

  • Question

  • Hi,

    I want to know the right way in order to expand a VHDX disk of a VM running on a failover cluster of 2 nodes. The nodes and the guest OS are running Windows Server 2012 R2. 

    I know that is posible to expand it online (with the VM running) but when I open the VM settings configuration page from Hyper-V manager, it says "some settings cannot be modified because the virtual machine was running".

    Thanks in advance.


    Cristian L Ruiz

    Tuesday, September 24, 2019 2:56 PM

All replies

  • Hello Cristian,

    Since your virtual machines are part of a failover cluster, the Failover Cluster Manager basically "takes over" some of the Hyper-V Manager's functionalities.

    So in order to edit a VM's settings, you might have to use the Failover Cluster Manager.

    Is your VM using IDE controllers? If the virtual disk in question belongs to the virtual IDE chain, then you cannot resize the virtual disk while the virtual machine is online.

    Best regards,
    Leon


    Blog: https://thesystemcenterblog.com LinkedIn:




    • Edited by Leon Laude Tuesday, September 24, 2019 3:15 PM
    Tuesday, September 24, 2019 3:07 PM
  • Hi,

    Do you know if exists an oficial paper with the procedure for a Failover Cluster?

    I found it but just for Windows server (not mentioning a failover cluster).

    https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/dn282284(v%3Dws.11)


    Cristian L Ruiz

    Tuesday, September 24, 2019 3:13 PM
  • The procedure is more or less similar as in the Hyper-V Manager, when you see the list of VMs within the Failover Cluster Manager, right-click the VM and select Settings.

    Is your VM using IDE controllers? If the virtual disk in question belongs to the virtual IDE chain, then you cannot resize the virtual disk while the virtual machine is online.


    Blog: https://thesystemcenterblog.com LinkedIn:

    Tuesday, September 24, 2019 3:19 PM
  • The VM is using the Scsi driver, so I was wondering why the Hyper-V administrator did not let me do it online as the article says.

    The need to find an oficial procedure is because the Customer wants to have it before doing it (if exists one).


    Cristian L Ruiz

    Tuesday, September 24, 2019 3:36 PM
  • As far as I know there's no official documentation of this procedure, I couldn't find one either when searching for one.

    The following article explains it step-by-step though:
    Expanding Virtual HDs managed by Windows Failover Cluster


    Blog: https://thesystemcenterblog.com LinkedIn:

    Tuesday, September 24, 2019 3:46 PM
  • That article ask for shutting down the VM, I suppose that is because is not taking in count the OS versión and its capabilities.

    Thanks anyway.


    Cristian L Ruiz

    Tuesday, September 24, 2019 3:54 PM
  • Yes they do shutdown the VM in that article, but it is not a necessary thing to do, depending on which controller the VM is using of course.

    The article was more to show you the steps with detailed pictures on how to accomplish this.


    Blog: https://thesystemcenterblog.com LinkedIn:

    Tuesday, September 24, 2019 4:00 PM
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