diff --git a/ogclient/functions/ogGetBootMbr b/ogclient/functions/ogGetBootMbr
new file mode 100755
index 0000000..5c3c887
--- /dev/null
+++ b/ogclient/functions/ogGetBootMbr
@@ -0,0 +1,22 @@
+#!/usr/bin/python3
+
+import sys
+import argparse
+from SystemLib import ogHelp
+from BootLib import ogGetBootMbr
+
+parser = argparse.ArgumentParser (add_help=False)
+parser.add_argument ('disk')
+
+if 2 == len (sys.argv) and 'help' == sys.argv[1]:
+    #parser.print_help() sale en inglés aunque la locale indique otra cosa
+    ogHelp ('ogGetBootMbr', 'ogGetBootMbr int_ndisk', ['ogGetBootMbr 1'])
+    sys.exit (0)
+
+args = parser.parse_args()
+ret = ogGetBootMbr (args.disk)
+
+if ret is not None:
+    if   ret == True: sys.exit (0)
+    elif ret == False: sys.exit (1)
+    else: print (ret)
diff --git a/ogclient/lib/python3/BootLib.py b/ogclient/lib/python3/BootLib.py
index a75442d..a13b050 100644
--- a/ogclient/lib/python3/BootLib.py
+++ b/ogclient/lib/python3/BootLib.py
@@ -187,6 +187,10 @@ fix_first_sector=yes
 #@exception OG_ERR_FORMAT    Formato incorrecto.
 #@exception OG_ERR_NOTFOUND  Dispositivo de disco no encontrado.
 #*/ ##
+def ogGetBootMbr (disk):
+    DISK = DiskLib.ogDiskToDev (disk)
+    if not DISK: return None
+    subprocess.run (['ms-sys', '-f', DISK])
 
 #/**
 #         ogWindowsBootParameters int_ndisk int_parition