KB2005: Delta disk format of virtual disks is not supported by datastore (VMware ESXi restore)
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Last reviewed date
Symptoms
When performing a guest VM restore on a VMware ESXi host, the following warning message is received, and the guest VM is not restored:
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.
Note: 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.
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