def create_section_data_block(data_length):
	"""Create a block of data to represend a section
	
	Creates a list of the given size and returns it. The list will have every
	byte set to 0xff. This is because reserved bits are normally set to 1
	Arguments:
		data_length -- amount of bytes needed for the data block
	Returns:
		A list of bytes of the desired length with zero in every byte
	"""
	data = [0xff] * data_length
	return data