Symptoms

The error is reported during backup (VMware VADP backup sets). 


Cause

A known VMware issue described in the VMware KB #2090639 "QueryChangedDiskAreas API returns incorrect sectors after extending virtual machine VMDK file with Changed Block Tracking (CBT) enabled" 


Workaround

Follow the recommendations available in the VMware KB #2090639 (apply the corresponding patch for the ESXi version running on the backup source VMWare environment). 


The link for this KB is:

https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2090639