How to set Clonezilla to clone only a partition

I have been trying to clone my Debian /dev/sda1 partition containing /root with size of 100GB using Clonezilla. I did this by using Clonezilla-live to create iso file with size around 18 GB. It seems succesfully clone /root. My problem rises when I tried to restore it in virtualbox which I created with drive size of 110GB. The restore process shows the following: Disk destinantion is too small! Destination disk size: 230686720 sectors (118.1 GB) Source disk size from the image: 976773168 sectors (500.1 GB) Program terminated!! It looks like Clonezilla only copies /root, but put the size of entire harddirsk instead of only 1 partition. Am I doing something wrong in creating iso file to restore 1 partition only? Or is it the limitation mentioned in Clonezilla website ? As far as I understand, it states that The destination partition must be equal or larger than the source one not The destination disk.