vSphere Replication cannot replicate VMs that are part of an MSCS cluster.

Products

• VMware Live Recovery

Issue/Introduction

Unable to replicate Clustered VM's with vSphere replication 

Configuring Virtual Machine for Replication fails with an error.

Operation Failed Cannot reconfigure replication group 'groupname' (managed object ID: 'GID-########-####-####-####-#########'). Details: 'The vSphere Replication configuration for disk with key 2,016 of the virtual machine has an issue: Replication not supported for disk type or backend.'.

Environment

VMware vSphere Replication 8.x
VMware vSphere Replication 9.x

Cause

Replicating a virtual disk attached to a SCSI controller configured with virtual or physical bus sharing is not supported. 

SCSI bus sharing must be set to “None” to be compatible with VMware vSphere Replication.

Resolution

vSphere Replication cannot replicate VMs configured with SCSI controllers in bus sharing mode (either virtual or physical). 

If bus sharing is required for the virtual machine, you must use array-based replication to protect the virtual machine. 

Site Recovery Manager supports protecting and recovering WSFC virtual machines with shared disks with array-based replication only.

Additional Information

WSFC virtual machines are configured with virtual disks opened in "multi-writer mode," which is not compatible with vSphere Replication. 

Multi-writer mode allows multiple VMs to open the same shared virtual disks or RDMs concurrently, but the guest operating system must provide functionality to elect which node in the cluster is allowed to write to the shared disks. 

Protecting Windows Server Failover Clustering and Fault Tolerant Virtual Machines
https://techdocs.broadcom.com/us/en/vmware-cis/live-recovery/site-recovery-manager/8-8/site-recovery-manager-administration-8-8/interoperability-of-srm-with-other-software/protecting-mscs-and-fault-tolerant-virtual-machines.html