Archive:Hyper-V Backup
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Introduction
Microsoft provides a VSS Writer for Hyper-V Server to enable an online backup of virtual machines. If a backup is started with SEP sesam, snapshots of the virtual machines are created and then the .vhd files as well as the already created snapshots are backed up.
System requirements
- Supported Versions
- Install a SEP sesam backup client (since Version 4.0.3) on each Hyper-V host.
- The backup client communication to the Sesam server has to work properly.
- For that, register the client by Sesam GUI
- Configure a backup task, e.g. source C:\temp ...
- ... and perform the backup. If the backup has been executed successfully, the communication between Sesam server and Sesam client works properly.
Backup procedure
Create a new backup task for the Hyper-V client which contains the virtual machines.
After starting the backup, Hyper-V automatically creates snapshots for every active virtual machine.
Then the backup task starts for the defined machines.
Restore procedure to existing VM
In case of a restore the corresponding virtual machine must be turned off. Afterwards single volumes (.vhd files), snapshots or the whole virtual machine can be restored.
- Example Restore of a single volume:
- Example Restore Snapshots:
Restore procedure to new VM
To create a new VM with the backed up (.vhd files), the restored (.vhd files) must be added as an "existing virtual hard disk".
Troubleshooting
Error message
- Error: DB Module: [ [Failed at thaw] - VSS_E_WRITERERROR_TIMEOUT. [Microsoft Hyper-V VSS Writer] - VSS_E_WRITERERROR_TIMEOUT]
- To resolve the issue install the following Microsoft service pack on the Hyper-V Node and also on each Microsoft VM running on that host
http://support.microsoft.com/en-us/kb/2996928
- Error: VSS_E_SNAPSHOT_SET_IN_PROGRESS error and in the Windows Event logs VDS basic provider error
- To resolve the issue install the following Microsoft service pack on the Hyper-V Node and also on each Microsoft VM running on that host
http://support.microsoft.com/de-de/kb/2838669/en-us