Hi Mohammed,
i have "host vMotioned" all VMs from host to other. Now i try to move a small VM (Used Storage 7.73 GB Provisioned 12.25 GB) but relocate is stopped on 18%. 
Could be also related to this KB http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2007427 ?