Error: "System has paused replication: Disk added to VM" When replicating Proxy VM's using VMware Cloud Director Availability.

Products

• VMware Cloud Director

Issue/Introduction

• Replication pauses daily at the same time a backup job commences.
• The issue may appear after a failover/reverse testing cycle has returned a VM to its original location.
• When replicating a Proxy VM in VMware Cloud Director Availability during the backup cycle performed by the Proxy VM the replication is automatically paused.

Environment

VMware Cloud Director Availability 4.x

Cause

This issue occurs due to the Proxy Backup VM hot adding disks to perform a backup within the Proxy VM OS. HBR is detecting the addition of an additional disk to the Proxy VM and this will pause the replication until the newly added disk is configured for replication.

VCDA's Host-Based Replication (HBR) treats the temporary attachment of disks by a backup proxy as a hardware modification, triggering a safety pause to ensure data integrity.

Resolution

In order to protect a backup proxy VM with VMware Cloud Director Availability, change the backup software configuration to network-mode so that it does not use the hot-add method.

Note: If Hot-Add is required, the replication must be manually resumed or re-synced after the backup proxy detaches the disks."