Barracuda Backup Servers running firmware 5.0 and higher
The most common cause for this error is a virtual machine that has 'crashed' or has missing blocks.
This article refers to VMware 4.1 and above with the VMware license which includes access to vSphere Data Recovery API.
This article describes how to resolve the error "Error reading object" encountered while backing up an ESX/ESXi virtual machine.
The most common causes for this error are a crashed virtual machine or missing blocks on the virtual machine.
When an error is encountered when backup up the disk, the following displays in the vSphere logs: Error QueryChangedDiskAreas
Contact Barracuda Networks Technical Support for information on enabling CBT from the VMware API.
Use the following steps to resolve this error:
1. Remove all virtual machine snapshots.
2. Disable changed block tracking.
3. Enable changed block tracking.
More details regarding the causes for this issue and their solutions can be found at the following link:http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2035976
Also, on our Barracuda Campus website:
Link to this page: