Re: CBT on Eager Zeroed Disks

Hi Andre,

Thanks for your prompt response.

This is something I found from the vSphere 5 documentation center. http://pubs.vmware.com/vsphere-50/index.jsp?topic=%2Fcom.vmware.vddk.pg.doc_50%2FvddkBkupVadp.9.3.html

“If the guest actually wrote to each block of a virtual disk (long format or secure erase), or if the virtual disk is thick and eager zeroed, or cloned thick disk, then the "*" query reports the entire disk as being in use.”

If I understand it correctly, then it means if a disk is provisioned using thick eager zeroed, the CBT would consider all disk sectors is in used thus backing up the entire disk rather than just the used disk space.

Note: Our Backup Agent communicates with the VDDK framework to perform the backup operation.

Thanks

Armaan