anchor.diff:      {noreply, State1};
   
   handle_gz({Host, _, SnapTime,
  -             {<<"sderr">>, Instance, _Name, _Class}, {<<"Soft Errors">>, V}},
  -            State) ->
  +           {<<"sderr">>, Instance, _Name, _Class}, {<<"Soft Errors">>, V}},
  +          State) ->
       ID = list_to_binary(integer_to_list(Instance)),
       Metric = <<"sd[", ID/binary, "].errors.hard">>,
       tachyon_guard:put(Host, SnapTime, Metric, V, 1),
  
positive.code:     {noreply, State1};
  
  handle_gz({Host, _, SnapTime,
               {<<"sderr">>, Instance, _Name, _Class}, {<<"Predictive Failure Analysis">>, V}},
              State) ->
      ID = list_to_binary(integer_to_list(Instance)),
      Metric = <<"sd[", ID/binary, "].", "predicted_failures">>,
      tachyon_guard:put(Host, SnapTime, Metric, V, 1),
  
negative.code:     {noreply, State1};
  
  handle_gz({Host, _, SnapTime,
             {<<"sderr">>, Instance, _Name, _Class}, {<<"Transport Errors">>, V}},
            State) ->
      ID = list_to_binary(integer_to_list(Instance)),
      Metric = <<"sd[", ID/binary, "].errors.transport">>,
      tachyon_guard:put(Host, SnapTime, Metric, V, 1),
  