code: def _initFilesystemInfo(self):
          
          self._mapFSpathDev = {}
          fsinfo = FilesystemInfo()
          for fs in fsinfo.getFSlist():
              devpath = fsinfo.getFSdev(fs)
              dev = self._getUniqueDev(devpath)
              if dev is not None:
                  self._mapFSpathDev[fs] = dev
docs: Initialize filesystem to device mappings.