code: def is_valid_volsize(self,volsize):
          
          
          if type(volsize) is int:
              size_temp = divmod(volsize, 8192)
              if size_temp[1] > 0: # If not on 8GB boundary
                  return int((1 + size_temp[0]) * 8192) # Always round to next 8GB increment
          else:
              return int(volsize)
docs: Convenience method that round input to valid ScaleIO Volume size (8GB increments)
          :param volsize: Size in MB
          :rtype int: Valid ScaleIO Volume size rounded to nearest 8GB increment above or equal to volsize