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[V8] ISSUE: Delta disk format of virtual disks is not supported by datastore (VMware ESXi restore)

Article ID: 8080
Reviewed: 2020-04-22

Product Version:
AhsayOBM: to 8.x
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."
* ... ... ...


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.

Important: 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.


VMware ESXi, datastore, guest, VMFS, virtual disks, VDDK

public/8080_vmware_esxi_restore_delta_disk_format_of_virtual_disks_is_not_supported_by_datastore.txt · Last modified: 2021/12/14 02:10 by anna.olalia

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