diff --git a/piecestorage/store_wrapper.go b/piecestorage/store_wrapper.go
index 0133c702..5ee8ca43 100644
--- a/piecestorage/store_wrapper.go
+++ b/piecestorage/store_wrapper.go
@@ -57,9 +57,12 @@ func (sw *storeWrapper) GetReaderCloser(ctx context.Context, s string) (io.ReadC
 	var rc io.ReadCloser
 	var err error
 	for _, name := range extendPiece(s) {
-		rc, err = sw.IPieceStorage.GetReaderCloser(ctx, name)
-		if err == nil {
-			return rc, nil
+		has, _ := sw.IPieceStorage.Has(ctx, name)
+		if has {
+			rc, err = sw.IPieceStorage.GetReaderCloser(ctx, name)
+			if err == nil {
+				return rc, nil
+			}
 		}
 	}
 
@@ -70,9 +73,12 @@ func (sw *storeWrapper) GetMountReader(ctx context.Context, s string) (mount.Rea
 	var reader mount.Reader
 	var err error
 	for _, name := range extendPiece(s) {
-		reader, err = sw.IPieceStorage.GetMountReader(ctx, name)
-		if err == nil {
-			return reader, nil
+		has, _ := sw.IPieceStorage.Has(ctx, name)
+		if has {
+			reader, err = sw.IPieceStorage.GetMountReader(ctx, name)
+			if err == nil {
+				return reader, nil
+			}
 		}
 	}
 
diff --git a/retrievalprovider/httpretrieval/server.go b/retrievalprovider/httpretrieval/server.go
index 82343b7a..e23df4a6 100644
--- a/retrievalprovider/httpretrieval/server.go
+++ b/retrievalprovider/httpretrieval/server.go
@@ -106,6 +106,10 @@ func (s *Server) retrievalByPieceCID(w http.ResponseWriter, r *http.Request) {
 	}
 	defer mountReader.Close() // nolint
 
+	var buf [32]byte
+	_, _ = mountReader.Read(buf[:])
+	fmt.Println("xxxx", string(buf[:]))
+
 	contentReader, err := handleRangeHeader(r.Header.Get("Range"), mountReader, len)
 	if err != nil {
 		log.Warnf("handleRangeHeader failed, Range: %s, error: %v", r.Header.Get("Range"), err)
@@ -179,7 +183,11 @@ func serveContent(w http.ResponseWriter, r *http.Request, content io.ReadSeeker,
 	// Write a line to the log
 	end := time.Now()
 	total, count := writeErrWatcher.total, writeErrWatcher.count
-	avg := total / count
+	var avg uint64
+	if count != 0 {
+		avg = total / count
+	}
+
 	completeMsg := fmt.Sprintf("GET %s\t%s - %s: %s / %s transferred",
 		r.URL, end.Format(time.RFC3339), start.Format(time.RFC3339), time.Since(start),
 		fmt.Sprintf("total %s (%d B), average write %s ", types.SizeStr(types.NewInt(total)), total, types.SizeStr(types.NewInt(avg))))
diff --git a/retrievalprovider/httpretrieval/server_test.go b/retrievalprovider/httpretrieval/server_test.go
index 7455567c..d02eca63 100644
--- a/retrievalprovider/httpretrieval/server_test.go
+++ b/retrievalprovider/httpretrieval/server_test.go
@@ -80,8 +80,9 @@ func TestRetrievalByPiece(t *testing.T) {
 	piece, err := cid.Decode(pieceStr)
 	assert.NoError(t, err)
 	buf := &bytes.Buffer{}
-	f, err := os.Create(filepath.Join(tmpDri, pieceStr))
+	f, err := os.Create(filepath.Join(tmpDri, pieceStr+".car"))
 	assert.NoError(t, err)
+	assert.NoError(t, os.MkdirAll(filepath.Join(tmpDri, pieceStr), os.ModePerm))
 	for i := 0; i < 100; i++ {
 		buf.WriteString("TEST TEST\n")
 	}