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Druva Documentation

Hyper-V virtual machine backup and restore considerations

Before you backup and restore Hyper-V virtual machines, ensure that you go through the following considerations. 

Considerations for backup and restore of Hyper-V virtual machines

  • How Phoenix handles VSS based backup of differencing virtual disks or virtual machines with differencing disks
    • Phoenix backs up parent and child disks separately.
    • When you restore the virtual machine or virtual disks to an alternate location, the parent and child disks are restored separately.
    • When you restore the virtual machine to the original location, only child disks are restored. The parent disk must be present on the virtual machine or else the restore job fails. You can download the original disk separately and attach it to the virtual machine before you run a restore job. 
  • How Phoenix handles RCT  based backup of differencing virtual disks or virtual machines with differencing disks
    • Phoenix backs up and restores the parent and child disks as one consolidated disk.
  • How Phoenix handles VSS based backup of virtual machines with shared disks attached to them
    • Phoenix backs up the virtual machine but does not back up the shared disk attached to it. 
  • How Phoenix handles RCT based backup of virtual machines with shared disks attached to them
    • Phoenix cannot run an RCT based backup of a virtual machine with shared disks attached to it and the backup job fails with the error HYPERV38.