code: def update(self):
          
          # Init new stats
          stats = self.get_init_value()
  
          if import_error_tag:
              return self.stats
  
          if self.input_method == 'local':
              # Update stats using the PyMDstat lib (https://github.com/nicolargo/pymdstat)
              try:
                  # Just for test
                  # mds = MdStat(path='/home/nicolargo/dev/pymdstat/tests/mdstat.10')
                  mds = MdStat()
                  stats = mds.get_stats()['arrays']
              except Exception as e:
                  logger.debug("Can not grab RAID stats (%s)" % e)
                  return self.stats
  
          elif self.input_method == 'snmp':
              # Update stats using SNMP
              # No standard way for the moment...
              pass
  
          # Update the stats
          self.stats = stats
  
          return self.stats
docs: Update RAID stats using the input method.