1 files changed, 9 insertions, 4 deletions
diff --git a/weed/storage/volume_create_windows.go b/weed/storage/volume_create_windows.go
index 81536810b..e1c0b961f 100644
--- a/weed/storage/volume_create_windows.go
+++ b/weed/storage/volume_create_windows.go
@@ -11,18 +11,23 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/storage/backend/memory_map/os_overloads"
 )
 
-func createVolumeFile(fileName string, preallocate int64, memoryMapSizeMB uint32) (backend.DataStorageBackend, error) {
-
+func createVolumeFile(fileName string, preallocate int64, memoryMapSizeMB uint32) (backend.BackendStorageFile, error) {
 	if preallocate > 0 {
 		glog.V(0).Infof("Preallocated disk space for %s is not supported", fileName)
 	}
 
 	if memoryMapSizeMB > 0 {
 		file, e := os_overloads.OpenFile(fileName, windows.O_RDWR|windows.O_CREAT, 0644, true)
-		return memory_map.NewMemoryMappedFile(file, memoryMapSizeMB), e
+		if e != nil {
+			return nil, e
+		}
+		return memory_map.NewMemoryMappedFile(file, memoryMapSizeMB), nil
 	} else {
 		file, e := os_overloads.OpenFile(fileName, windows.O_RDWR|windows.O_CREAT|windows.O_TRUNC, 0644, false)
-		return backend.NewDiskFile(file), e
+		if e != nil {
+			return nil, e
+		}
+		return backend.NewDiskFile(file), nil
 	}
 
 }