diff --git a/weed/storage/erasure_coding/ec_encoder.go b/weed/storage/erasure_coding/ec_encoder.go
index 5ff73de69..a873b7ce5 100644
--- a/weed/storage/erasure_coding/ec_encoder.go
+++ b/weed/storage/erasure_coding/ec_encoder.go
@@ -1,8 +1,40 @@
 package erasure_coding
 
+import (
+	"io"
+	"os"
+
+	"github.com/klauspost/reedsolomon"
+)
+
 const (
 	DataShardsCount             = 10
 	ParityShardsCount           = 4
 	ErasureCodingLargeBlockSize = 1024 * 1024 * 1024 // 1GB
 	ErasureCodingSmallBlockSize = 1024 * 1024        // 1MB
 )
+
+func encodeData(file *os.File, enc reedsolomon.Encoder, startOffset, blockSize int64, buffers [][]byte) error {
+
+	// read data into buffers
+	for i := 0; i < DataShardsCount; i++ {
+		n, err := file.ReadAt(buffers[i], startOffset+blockSize*int64(i))
+		if err != nil {
+			if err != io.EOF {
+				return err
+			}
+		}
+		if n < len(buffers[i]) {
+			for t := len(buffers[i]) - 1; t >= n; t-- {
+				buffers[i][t] = 0
+			}
+		}
+	}
+
+	err := enc.Encode(buffers)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
diff --git a/weed/storage/erasure_coding/ec_test.go b/weed/storage/erasure_coding/ec_test.go
index 8f75384c0..b7c3ae0dd 100644
--- a/weed/storage/erasure_coding/ec_test.go
+++ b/weed/storage/erasure_coding/ec_test.go
@@ -1,7 +1,6 @@
 package erasure_coding
 
 import (
-	"io"
 	"os"
 	"testing"
 
@@ -51,27 +50,3 @@ func TestEncodingDecoding(t *testing.T) {
 
 }
 
-func encodeData(file *os.File, enc reedsolomon.Encoder, startOffset, blockSize int64, buffers [][]byte) error {
-
-	// read data into buffers
-	for i := 0; i < DataShardsCount; i++ {
-		n, err := file.ReadAt(buffers[i], startOffset+blockSize*int64(i))
-		if err != nil {
-			if err != io.EOF {
-				return err
-			}
-		}
-		if n < len(buffers[i]) {
-			for t := len(buffers[i]) - 1; t >= n; t-- {
-				buffers[i][t] = 0
-			}
-		}
-	}
-
-	err := enc.Encode(buffers)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}