To protect a Hyper-V server agentlessly, you do not need to install the Rapid Recovery Agent on any VMs. You only need install it on the host machine or cluster node. The Agent protects the virtual hard disk on the host and converts any changes on the hard disk files to a volume image or disk image, depending on the file system.
NOTE: The Hyper-V agentless feature is compatible only with Windows Server 2012 R2 and later.
NOTE: Rapid Recovery supports the VHDx disk file format. It does not support the VHD format.
When a host or node is running, Rapid Recovery creates an application-consistent backup. If the host is not running, no backup can be created. If one of the nodes is not running, then Rapid Recovery can continue taking snapshots of the VMs on the cluster.
NOTE: For an application-consistent snapshot, you must have the SCSI Controller installed on each VM. Without this controller, the result is always a crash-consistent snapshot.
Agentless Hyper-V protection has many of the same capabilities as traditional protection where the Agent is installed on every VM, including:
However, there are limitations to consider when choosing agentless Hyper-V protection. Capabilities that are not performed include:
NOTE: For best performance, it is recommended that the maximum concurrent transfers for the Hyper-V host or node be set to 1, which is the default setting.
NOTE: Agentless protection of Hyper-V VMs may fail if the Rapid Recovery Core is installed on the same Hyper-V host. Please make sure that Core machine is either VM itself, or a separate physical server.
For more information on this topic, please see: