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VM backups from Cluster Shared Volumes? RRS feed

  • Question

  • I was able to backup all eight of my virtual machines to tape over the weekend, but noticed that when each one was getting backed up there were not available. Is this due to the fact that the VMs are running on Hyper-V Cluster Shared Volumes?

    Sunday, May 15, 2011 8:03 PM

Answers

  • Hi,

    OK, Then that means you probably need to check your cluster network setup and make sure it can handle the redirected mode traffic. 

    System Center Data Protection Manager 2010 Hyper-V protection Configuring cluster networks for CSV redirected access
    http://support.microsoft.com/kb/2473194

    You can also investigate installing a VSS hardware snapshot provider if your SAN storage supports one. That wil reduce the time the CSV is in redirected mode.

    Below is the tested hardware providers.

    Tested hardware VSS provider table
    http://blogs.technet.com/dpm/archive/2010/02/05/tested-hardware-vss-provider-table.aspx


    Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.
    Monday, May 16, 2011 2:08 PM
    Moderator
  •  

    Tested this over the weekend. Turns out if the host that the VM is running on owns the CSV then the backup works fine. If the CSV is owned by a different host then the VM is unavailable until the backup is complete.

     

    • Marked as answer by Carltonw1 Sunday, May 22, 2011 2:30 PM
    Sunday, May 22, 2011 2:30 PM

All replies

  • Hi,

    Can you define "unavailable" - are they going into saved state or just unavailable to clients from the network while backup is in progress ?  

    To list hyper-V writer captions for guests to see if online or saved state backups are being done:

    From an administrative command prompt:

    a. Type: copy con script.txt and press enter
    b. Type: list writers and press enter
    c. Press CTRL + Z (to save)
    d. Type: diskshadow /s script.txt | find /i "caption: backup using"

    Output will be displayed for each guest.

    Do you have a vss hardware snapshot provider installed or are the snapshots just being created by the system software provider ?

    Please review this article to ensure the cluster network configuation is optimal for csv cluster.

    System Center Data Protection Manager 2010 Hyper-V protection Configuring cluster networks for CSV redirected access
    http://support.microsoft.com/kb/2473194

     

     


    Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.
    Sunday, May 15, 2011 10:30 PM
    Moderator
  • Mike,

    They are "unavailable" to clients while the storage for those VMs is in redirected state. I've checked two of the servers that were unavailable and noticed that the owners of the storage were not the same hosts as the VMs were running on. Is it possible that this is a requirement?

    Monday, May 16, 2011 12:21 AM
  • Hi,

    OK, Then that means you probably need to check your cluster network setup and make sure it can handle the redirected mode traffic. 

    System Center Data Protection Manager 2010 Hyper-V protection Configuring cluster networks for CSV redirected access
    http://support.microsoft.com/kb/2473194

    You can also investigate installing a VSS hardware snapshot provider if your SAN storage supports one. That wil reduce the time the CSV is in redirected mode.

    Below is the tested hardware providers.

    Tested hardware VSS provider table
    http://blogs.technet.com/dpm/archive/2010/02/05/tested-hardware-vss-provider-table.aspx


    Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.
    Monday, May 16, 2011 2:08 PM
    Moderator
  • If the suggested answer does not help in resolving this thread then please re-open it.
    Cheers, Tyler F [MSFT] - This posting is provided "AS IS" with no warranties, and confers no rights.
    Friday, May 20, 2011 6:49 PM
    Moderator
  •  

    Tested this over the weekend. Turns out if the host that the VM is running on owns the CSV then the backup works fine. If the CSV is owned by a different host then the VM is unavailable until the backup is complete.

     

    • Marked as answer by Carltonw1 Sunday, May 22, 2011 2:30 PM
    Sunday, May 22, 2011 2:30 PM