diff -ur grub-2.02~beta3_o/grub-core/disk/diskfilter.c grub-2.02~beta3_n/grub-core/disk/diskfilter.c
--- grub-2.02~beta3_o/grub-core/disk/diskfilter.c	2015-09-02 21:10:53.000000000 +0100
+++ grub-2.02~beta3_n/grub-core/disk/diskfilter.c	2016-07-10 23:38:23.744531259 +0100
@@ -911,8 +911,9 @@
 		 grub_size_t size __attribute ((unused)),
 		 const char *buf __attribute ((unused)))
 {
-  return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
-		     "diskfilter writes are not supported");
+/*  return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
+		     "diskfilter writes are not supported");*/
+    return GRUB_ERR_NONE;
 }
 
 struct grub_diskfilter_vg *