I do not need a solution (just sharing information)
Symantec and VMware are unwaveringly dedicated to quality in our jointly developed solutions. During our testing with the VMware vStorage 5.1 API Symantec discovered issues* that introduce data recovery risks. We raised these concerns with our friends at VMware, who documented them in their knowledge base and in the VMware vSphere 5.1 release notes. VMware expects to release a vStorage API update, and at that time we expect to retest and once again support joint solutions.
Read this blog for more details!