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Prerequisites for virtual machine protection

Updated: December 3, 2014

Applies To: System Center 2012 - Data Protection Manager, System Center 2012 R2 Data Protection Manager, System Center 2012 SP1 - Data Protection Manager

After reading about available Hyper-V backup scenarios in Protect Hyper-V virtual machines, verify the prerequisites in for the backing up virtual machines.

Before you start

Note the following limitations:

  • You can protect up to 800 virtual machines of 100 GB each on one DPM server and allows multiple DPM servers that support larger clusters.

  • DPM excludes the page file from incremental backups to improve virtual machine backup performance.

  • DPM can only back up virtual machines for Hyper-V server clusters that are in the same domain as the DPM server.

  • Using host-level backup to back up virtual machine data on passthrough disks isn’t supported. In this scenario we recommend you use host-level back to backup VHD files and guest-level back to back up the other data that isn’t visible on the host.

  • You can backup Linux virtual machines using DPM 2012 R2. Only file-consistent snapshots are supported.

  • When protecting a Hyper-V cluster using scaled-out DPM protection (multiple DPM server protecting a large Hyper-V cluster) you can’t add secondary protection for the protected Hyper-V workloads.

  • You can only backup replica virtual machines if DPM is running System Center 2012 R2 and the Hyper-V host is running on Windows Server 2012 R2.

  • You can back up deduplicated volumes.

DPM prerequisites

  1. If you want to perform item-level recovery for virtual machines (recover files, folders, volumes) then you’ll need to install the Hyper-V role on the DPM server. DPM. If you only want to recover the virtual machine and not item-level then the role isn’t required.

Hyper-V prerequisites

  • Make sure the server meets Hyper-V requirements. For more information, see Install the Hyper-V Role and Configure a Virtual Machine.

  • For CSV storage, install the Volume Shadow Copy Services (VSS) hardware provider on the Hyper-V server. Contact your storage area network (SAN) vendor for the VSS hardware provider.

Virtual machine prerequisites

  • The version of Integration Components that is running on the virtual machine should be the same as the version of Hyper-V on the server that is running Hyper-V.

  • For each virtual machine backup you’ll need free space on the volume hosting the virtual hard disk files to allow Hyper-V enough room for differencing disks (AVHD’s) during backup. The space must be at least equal to the calculation Initial disk size*Churn rate*Backup window time. If you’re running multiple backups on a cluster, you’ll need enough storage capacity to accommodate the AVHDs for each of the virtual machines using this calculation.

  • If you want to backup virtual machines located on a Hyper-V host servers running Windows Server 2012 R2, the virtual machine should have a SCSI controller specified, even if it’s not connected to anything. This is because for online backup in Windows Server 2012 R2 the Hyper-V host mounts a new VHD in the VM and then dismounts it later. Only the SCSI controller can support this and thus is required for online backup of the virtu al machine. The SCSI controller doesn’t it became clear why we need this SCSI controller. Without this setting, event ID 10103 will be issued when you try to back up the virtual machine.

For additional resources, see Information and Support for System Center 2012.

Tip: Use this query to find online documentation in the TechNet Library for System Center 2012. For instructions and examples, see Search the System Center 2012 Documentation Library.
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