'Create data to be loaded into tables.
Data contains two columns of:
<num>     0x<hex_num>
where <num> goes from 0 to 255 inclusive.'

@classmethod
def _make_data_file(cls, filename):

    cls.cluster.fs.setuser(cls.cluster.superuser)
    f = cls.cluster.fs.open(filename, 'w')
    for x in xrange(256):
        f.write(('%d DCTB 0x%x\n' % (x, x)))
    f.close()
