VSC 6.2.1 is the last version supporting backup and recovery functionality. Starting VSC 7.0, the back and recovery functionality has moved to SnapCenter portfolio with SnapCenter Plug-in for VMware vSphere.
Both VSC and SCV can selectively backup VMs but not VMDKs. It backs up all VMDKs associated with VM or a datastore. However while doing a restore you can selectively restore VMDKs to original or alternate datastore.