fix issue 6647

Signed-off-by: Lyndon-Li <lyonghui@vmware.com>

pkg/controller/backup_controller.go

@@ -88,6 +88,7 @@ type backupReconciler struct {
 	volumeSnapshotClient        snapshotterClientSet.Interface
 	credentialFileStore         credentials.FileStore
 	maxConcurrentK8SConnections int
+	defaultSnapshotMoveData     bool
 }
 
 func NewBackupReconciler(
@@ -113,6 +114,7 @@ func NewBackupReconciler(
 	volumeSnapshotClient snapshotterClientSet.Interface,
 	credentialStore credentials.FileStore,
 	maxConcurrentK8SConnections int,
+	defaultSnapshotMoveData bool,
 ) *backupReconciler {
 	b := &backupReconciler{
 		ctx:                         ctx,
@@ -138,6 +140,7 @@ func NewBackupReconciler(
 		volumeSnapshotClient:        volumeSnapshotClient,
 		credentialFileStore:         credentialStore,
 		maxConcurrentK8SConnections: maxConcurrentK8SConnections,
+		defaultSnapshotMoveData:     defaultSnapshotMoveData,
 	}
 	b.updateTotalBackupMetric()
 	return b
@@ -353,6 +356,10 @@ func (b *backupReconciler) prepareBackupRequest(backup *velerov1api.Backup, logg
 		request.Spec.DefaultVolumesToFsBackup = &b.defaultVolumesToFsBackup
 	}
 
+	if request.Spec.SnapshotMoveData == nil {
+		request.Spec.SnapshotMoveData = &b.defaultSnapshotMoveData
+	}
+
 	// find which storage location to use
 	var serverSpecified bool
 	if request.Spec.StorageLocation == "" {