Backup Job for VMs from ESXi hosts with "Content Based Read Cache" (CBRC) enabled fail and and the following error is shown:
Error Hot-add of digest enabled disk not supported scsi0:1. Error Failed to attach disk 2000 to source Linux backup proxy <IP address> (<GUID>) (System.Exception)
This issue occurs if a Linux-based VMware Backup Proxy is used by a backup job because when Veeam tries to hot-add a virtual disk to a VM which is deployed on the ESXi host with the CBRC option enabled.
Due to a VMware limitation, when CBRC is enabled, it is impossible to attach disks to VMs while powered-on.
According to VMware documentation, the CBRC feature was introduced in vSphere 5.1, which may affect all systems with this version and above.
If it is not possible to upgrade Veeam Backup & Replication to version 11 or newer, the following workarounds may be used with Veeam Backup & Replication 10:
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