diff --git a/weed/server/volume_grpc_copy.go b/weed/server/volume_grpc_copy.go
index 393ea357d..96ea8c3b5 100644
--- a/weed/server/volume_grpc_copy.go
+++ b/weed/server/volume_grpc_copy.go
@@ -6,12 +6,14 @@ import (
 	"io"
 	"math"
 	"os"
+	"path"
 	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
 	"github.com/chrislusf/seaweedfs/weed/storage"
+	"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
@@ -199,11 +201,16 @@ func (vs *VolumeServer) CopyFile(req *volume_server_pb.CopyFileRequest, stream v
 		}
 		fileName = v.FileName() + req.Ext
 	} else {
-		ecv, found := vs.store.FindEcVolume(needle.VolumeId(req.VolumeId))
-		if !found {
-			return fmt.Errorf("not found ec volume id %d", req.VolumeId)
+		baseFileName := erasure_coding.EcShardBaseFileName(req.Collection, int(req.VolumeId)) + req.Ext
+		for _, location := range vs.store.Locations {
+			tName := path.Join(location.Directory, baseFileName)
+			if util.FileExists(tName){
+				fileName = tName
+			}
+		}
+		if fileName == "" {
+			return fmt.Errorf("CopyFile not found ec volume id %d", req.VolumeId)
 		}
-		fileName = ecv.FileName() + req.Ext
 	}
 
 	bytesToRead := int64(req.StopOffset)
diff --git a/weed/server/volume_grpc_erasure_coding.go b/weed/server/volume_grpc_erasure_coding.go
index da2146ccb..5568596a9 100644
--- a/weed/server/volume_grpc_erasure_coding.go
+++ b/weed/server/volume_grpc_erasure_coding.go
@@ -200,7 +200,7 @@ func (vs *VolumeServer) VolumeEcShardRead(req *volume_server_pb.VolumeEcShardRea
 
 	ecVolume, found := vs.store.FindEcVolume(needle.VolumeId(req.VolumeId))
 	if !found {
-		return fmt.Errorf("not found ec volume id %d", req.VolumeId)
+		return fmt.Errorf("VolumeEcShardRead not found ec volume id %d", req.VolumeId)
 	}
 	ecShard, found := ecVolume.FindEcVolumeShard(erasure_coding.ShardId(req.ShardId))
 	if !found {
diff --git a/weed/shell/command_ec_common.go b/weed/shell/command_ec_common.go
index 0cbf694cd..b5560b560 100644
--- a/weed/shell/command_ec_common.go
+++ b/weed/shell/command_ec_common.go
@@ -62,7 +62,7 @@ func oneServerCopyAndMountEcShardsFromSource(ctx context.Context, grpcDialOption
 				SourceDataNode: existingLocation,
 			})
 			if copyErr != nil {
-				return copyErr
+				return fmt.Errorf("copy %d.%v %s => %s : %v\n", volumeId, shardIdsToCopy, existingLocation, targetServer.info.Id, copyErr)
 			}
 		}
 
@@ -73,7 +73,7 @@ func oneServerCopyAndMountEcShardsFromSource(ctx context.Context, grpcDialOption
 			ShardIds:   shardIdsToCopy,
 		})
 		if mountErr != nil {
-			return mountErr
+			return fmt.Errorf("mount %d.%v on %s : %v\n", volumeId, shardIdsToCopy, targetServer.info.Id, mountErr)
 		}
 
 		if targetServer.info.Id != existingLocation {
diff --git a/weed/shell/command_ec_encode.go b/weed/shell/command_ec_encode.go
index 94265a874..f84fcf303 100644
--- a/weed/shell/command_ec_encode.go
+++ b/weed/shell/command_ec_encode.go
@@ -97,7 +97,7 @@ func doEcEncode(ctx context.Context, commandEnv *commandEnv, collection string,
 	// balance the ec shards to current cluster
 	err = spreadEcShards(ctx, commandEnv, vid, collection, locations)
 	if err != nil {
-		return fmt.Errorf("spread ec shards for volume %d to %s: %v", vid, locations[0].Url, err)
+		return fmt.Errorf("spread ec shards for volume %d from %s: %v", vid, locations[0].Url, err)
 	}
 
 	return nil