Back up virtual machines in clusters with CSV storage
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
Data Protection Manager (DPM) in System Center 2012 can back up virtual machines that are using Cluster Shared Volume (CSV) storage.
CSV is a feature of failover clustering that was introduced in Windows Server 2008 R2. CSV allows you to store multiple virtual machines running on multiple hosts in a cluster on a single storage volume. A CSV is a shared single disk that contains an NTFS volume. Multiple virtual machines can be stored on a CSV, and the CSV can be accessed by multiple Hyper-V host servers installed on failover cluster nodes. You can have multiple CSVs in a Hyper-V cluster. Typically, all of the virtual hard disks (VHDs) of virtual machines in the cluster are stored on a common CSV, so that any node in the cluster can access the VHDs.
Before you start
Before you deploy protection note the following:
If you’re running Windows Server 2008 R2 I/O redirection is used for DPM backup, and CSV backup is serialized, impacting performance. This limitation is removed from Windows Server 2012 onwards.
If you are running Hyper-V on Windows Server 2008 R2 and you’re backing up multiple clusters with DPM, ensure that only one backup uses the same CSV at any one time. To do this, follow the instructions in Serialize virtual machine backups. If you’re currently using the integrated software VSS and you want to move to a hardware VSS, follow the instructions in Migrate to a hardware VSS provider.
A single node shutdown in a CSV cluster causes all virtual machines in the cluster to be marked as inconsistent. This action starts consistency checks for all virtual machines.
If BitLocker Drive Encryption is enabled on the CSV cluster, to restart a server that is running Hyper-V, you must run a consistency check for Hyper-V virtual machines.
Then follow the steps in Configure CSV backups.
For additional resources, see Information and Support for System Center 2012.
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