public ManagedObjectReference createVmfsDatastore(String datastoreName, HostScsiDisk hostScsiDisk) throws Exception {
// just grab the first instance of VmfsDatastoreOption
VmfsDatastoreOption vmfsDatastoreOption = _context.getService().queryVmfsDatastoreCreateOptions(_mor, hostScsiDisk.getDevicePath(), 5).get(0);
VmfsDatastoreCreateSpec vmfsDatastoreCreateSpec = (VmfsDatastoreCreateSpec)vmfsDatastoreOption.getSpec();
// set the name of the datastore to be created
vmfsDatastoreCreateSpec.getVmfs().setVolumeName(datastoreName);
return _context.getService().createVmfsDatastore(_mor, vmfsDatastoreCreateSpec);
}