I Think I will create a new datastore and migrate all the vm to the new datastore first the esxi A, but for moving the vm from one datastore to another in esxi A, how I can move ?
What is your license level ? You are using your infrastructure in evaluation mode? right? Because using vsphere client you can migrate a vm with storage vmotion from a datastore to another without shared storage.
Check the requierement first.VMware vSphere 5.1
Regards,
Julien