Storm season is back, bringing with it the potential for significant weather events. If you have clients in areas prone to infrastructure disruption, visit the Disaster Recovery Resources guide for preparedness information. Datto recommends performing proactive disaster recovery testing to mitigate potential downtime. See our articles about the importance of disaster recovery testing and Preparing For A Cloud Virtualization Test: Policies, Procedures, And Partner Responsibilities to learn more. For live updates, follow @datto on Twitter.

Datto and Support for Clustered Shared Volumes (CSVs)



This article provides information about Cluster Shared Volume (CSV) incompatibilities with the Datto solution.


  • Virtual Products
  • Hyper-V


High Availability Cluster :  A High Availability Cluster is a group of 2 or more bare metal servers which are used to host virtual machines.

Clustered Shared Volume : A CSV is a disk or pool of disks which is accessible by each node as if it were a logical disk on the system.


The Datto solution does not support the backup of Clustered Shared Volumes (CSVs) on any platform, due to the manner in which the STCVSM filter driver is read within Hyper-V. The filter driver ends up picking up an altitude that forces Hyper-V into redirected access mode when running backups. This is a shortcoming of the way Hyper-V interacts with its VMs, whereas vSphere does not pick up specific information about the driver versions in a virtual machine.

Additional Resources

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