diff --git a/src/machi_basho_bench_driver.erl b/src/machi_basho_bench_driver.erl
index 4adc052..4da9def 100644
--- a/src/machi_basho_bench_driver.erl
+++ b/src/machi_basho_bench_driver.erl
@@ -1,6 +1,6 @@
 %% -------------------------------------------------------------------
 %%
-%% Copyright (c) 2007-2015 Basho Technologies, Inc.  All Rights Reserved.
+%% Copyright (c) 2007-2016 Basho Technologies, Inc.  All Rights Reserved.
 %%
 %% This file is provided to you under the Apache License,
 %% Version 2.0 (the "License"); you may not use this file
@@ -95,7 +95,9 @@ new(Id) ->
 run(append, KeyGen, ValueGen, #m{conn=Conn}=S) ->
     Prefix = KeyGen(),
     Value = ValueGen(),
-    case machi_cr_client:append_chunk(Conn, Prefix, Value, ?THE_TIMEOUT) of
+    CSum = machi_util:make_client_csum(Value),
+    AppendOpts = {append_opts,0,undefined,false},
+    case machi_cr_client:append_chunk(Conn, undefined, Prefix, Value, CSum, AppendOpts, ?THE_TIMEOUT) of
         {ok, Pos} ->
             EtsKey = ets:update_counter(?ETS_TAB, max_key, 1),
             true = ets:insert(?ETS_TAB, {EtsKey, Pos}),
@@ -137,9 +139,8 @@ load_ets_table(Conn, ETS) ->
     [begin
          {ok, InfoBin} = machi_cr_client:checksum_list(Conn, File),
          PosList = machi_csum_table:split_checksum_list_blob_decode(InfoBin),
+         ?INFO("File ~s len PosList ~p\n", [File, length(PosList)]),
          StartKey = ets:update_counter(ETS, max_key, 0),
-         %% _EndKey = lists:foldl(fun({Off,Sz,CSum}, K) ->
-         %%                               V = {File, Off, Sz, CSum},
          {_, Bytes} = lists:foldl(fun({Off,Sz,_CSum}, {K, Bs}) ->
                                           V = {File, Off, Sz},
                                           ets:insert(ETS, {K, V}),
diff --git a/src/machi_util.erl b/src/machi_util.erl
index 95a42a5..164ab88 100644
--- a/src/machi_util.erl
+++ b/src/machi_util.erl
@@ -25,6 +25,7 @@
 -export([
          checksum_chunk/1,
          make_tagged_csum/1, make_tagged_csum/2,
+         make_client_csum/1,
          unmake_tagged_csum/1,
          hexstr_to_bin/1, bin_to_hexstr/1,
          hexstr_to_int/1, int_to_hexstr/2, int_to_hexbin/2,
@@ -327,6 +328,9 @@ make_tagged_csum(?CSUM_TAG_SERVER_SHA_ATOM, SHA) ->
 make_tagged_csum(?CSUM_TAG_SERVER_REGEN_SHA_ATOM, SHA) ->
     <<?CSUM_TAG_SERVER_REGEN_SHA:8, SHA/binary>>.
 
+make_client_csum(BinOrList) ->
+    make_tagged_csum(?CSUM_TAG_CLIENT_SHA_ATOM, checksum_chunk(BinOrList)).
+
 unmake_tagged_csum(<<Tag:8, Rest/binary>>) ->
     {Tag, Rest}.