big gaps between Backup Size and used Size on VM.

Hello,

I have 4 VMs (windows server 2003 whose 1 is an SBS) on an ESXi 5.0.0 (515841), that I expect to backup on a window 2003 with Windows svc for UNix, using thus an NFS share as the backup store.

I use latest GhettoVCB for backup.

Following info retrieved from

# Created: 11/17/2008.

# Last modified: 2013_01_11 Version 0

I use 2gbsparse for all my backups, and all backup report Status are OK.

But except VM2 vm whose backup size is the same as space used on my vm 2k3 box the others do not correpond at all.

_________________________

VM1: 91GB USED

backup size: 193.6GB

_________________________

VM2 : 195GB USED

backup size: 194.5GB

_________________________

VM3: 52.3GB USED

backup size: 64.8GB

_________________________

VM4: 121.1GB USED

backup size: 225.1GB

Having VM4 and VM1 backups twice bigger than real used space is not normal. Or do I miss something?

Regards,

Xavier.