diff --git a/weed/filer/remote_mapping.go b/weed/filer/remote_mapping.go
index c1aa16107..fb74dca98 100644
--- a/weed/filer/remote_mapping.go
+++ b/weed/filer/remote_mapping.go
@@ -2,11 +2,30 @@ package filer
 
 import (
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/remote_pb"
 	"github.com/golang/protobuf/proto"
+	"google.golang.org/grpc"
 )
 
+func ReadMountMappings(grpcDialOption grpc.DialOption, filerAddress string) (mappings *remote_pb.RemoteStorageMapping, readErr error) {
+	var oldContent []byte
+	if readErr = pb.WithFilerClient(filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		oldContent, readErr = ReadInsideFiler(client, DirectoryEtcRemote, REMOTE_STORAGE_MOUNT_FILE)
+		return readErr
+	}); readErr != nil {
+		return nil, readErr
+	}
+
+	mappings, readErr = UnmarshalRemoteStorageMappings(oldContent)
+	if readErr != nil {
+		return nil, fmt.Errorf("unmarshal mappings: %v", readErr)
+	}
+
+	return
+}
+
 func InsertMountMapping(filerClient filer_pb.FilerClient, dir string, remoteStorageLocation *remote_pb.RemoteStorageLocation) (err error) {
 
 	// read current mapping
diff --git a/weed/filer/remote_storage.go b/weed/filer/remote_storage.go
index d1f443606..4ff21f3b3 100644
--- a/weed/filer/remote_storage.go
+++ b/weed/filer/remote_storage.go
@@ -131,23 +131,6 @@ func UnmarshalRemoteStorageMappings(oldContent []byte) (mappings *remote_pb.Remo
 	return
 }
 
-func ReadMountMappings(grpcDialOption grpc.DialOption, filerAddress string) (mappings *remote_pb.RemoteStorageMapping, readErr error) {
-	var oldContent []byte
-	if readErr = pb.WithFilerClient(filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
-		oldContent, readErr = ReadInsideFiler(client, DirectoryEtcRemote, REMOTE_STORAGE_MOUNT_FILE)
-		return readErr
-	}); readErr != nil {
-		return nil, readErr
-	}
-
-	mappings, readErr = UnmarshalRemoteStorageMappings(oldContent)
-	if readErr != nil {
-		return nil, fmt.Errorf("unmarshal mappings: %v", readErr)
-	}
-
-	return
-}
-
 func ReadRemoteStorageConf(grpcDialOption grpc.DialOption, filerAddress string, storageName string) (conf *remote_pb.RemoteConf, readErr error) {
 	var oldContent []byte
 	if readErr = pb.WithFilerClient(filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {