===== ISSUE: Delta disk format of virtual disks is not supported by datastore (VMware ESXi restore) =====
Article ID: 8080
Reviewed: 22/04/2020
Product Version: CloudBacko Pro: 4.1 or above
OS: Windows
===== Problem Description =====
When performing a guest VM restore on a VMware ESXi host, the following warning message is received, and the guest VM is not restored:
No.
Type
Timestamp
Log
*
info
...
...
*
warn
YYYY/MM/DD
hh:mm:ss
"Delta disk format of virtual disks is not supported by datastore."
*
...
...
...
===== Cause =====
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.
===== Resolution =====
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.