code: def create(self, *args, **kwargs):
          
          try:
              return super(CloudBlockStorageManager, self).create(*args,
                      **kwargs)
          except exc.BadRequest as e:
              msg = e.message
              if "Clones currently must be >= original volume size" in msg:
                  raise exc.VolumeCloneTooSmall(msg)
              else:
                  raise
docs: Catches errors that may be returned, and raises more informational
          exceptions.