Article ID: 8080
Product Version: CloudBacko Pro: 4.1 or above
When performing a guest VM restore on a VMware ESXi host, the following warning message is received, and the guest VM is not restored:
|*||warn||YYYY/MM/DD hh:mm:ss||"Delta disk format of virtual disks is not supported by datastore."|
This issue can occur if the guest virtual machine was originally backed up from a VMware ESXi host with a datastore of a different VMFS version.
For example, the backup of the virtual machine was done on a VMWare ESXi host with a VMFS5 datastore in VDDK backup mode, but the user is not attempting to restore the virtual machine to another VMware ESXi host using a VMFS6 datastore, and vice versa.
This limitation does not apply to VMware vCenter backup sets.
Unfortunately, there is no workaround for this issue. You can only restore to the corresponding guest virtual machine to a VMware ESXi host with datastore that is using the same VMFS version.