diff -Naur drbd-utils-8.9.5.orig/documentation/v84/drbdsetup.xml drbd-utils-8.9.5/documentation/v84/drbdsetup.xml
--- drbd-utils-8.9.5.orig/documentation/v84/drbdsetup.xml	2015-12-24 14:13:13.928784939 +0800
+++ drbd-utils-8.9.5/documentation/v84/drbdsetup.xml	2015-12-24 14:14:51.533778352 +0800
@@ -1889,6 +1889,24 @@
               <para>Clears the sync bitmap in addition to generating a new current UUID.</para>
             </listitem>
           </varlistentry>
+
+          <varlistentry>
+            <term><option>--zeroout-devices</option></term>
+
+            <listitem>
+              <para>Start to zeroing out the device on both side in addition to generating
+              a new current UUID .</para>
+            </listitem>
+          </varlistentry>
+
+          <varlistentry>
+            <term><option>--discard-devices</option></term>
+
+            <listitem>
+              <para>Start to allocate a thinly provided backing device on both side in
+              addition to generating a new current UUID .</para>
+            </listitem>
+          </varlistentry>
         </variablelist></para>
 
       <para>This can be used to skip the initial sync, if you want to start from scratch. This
diff -Naur drbd-utils-8.9.5.orig/user/v84/config_flags.c drbd-utils-8.9.5/user/v84/config_flags.c
--- drbd-utils-8.9.5.orig/user/v84/config_flags.c	2015-12-24 14:13:13.937784939 +0800
+++ drbd-utils-8.9.5/user/v84/config_flags.c	2015-12-24 14:15:44.450774781 +0800
@@ -1028,6 +1028,8 @@
 	NLA_POLICY(new_c_uuid_parms),
 	.fields = {
 		{ "clear-bitmap", FLAG(clear_bm) },
+        { "zeroout-devices", FLAG(zeroout_devices) },
+        { "discard-devices", FLAG(discard_devices) },
 		{ } },
 };
 
diff -Naur drbd-utils-8.9.5.orig/user/v84/linux/drbd_genl.h drbd-utils-8.9.5/user/v84/linux/drbd_genl.h
--- drbd-utils-8.9.5.orig/user/v84/linux/drbd_genl.h	2015-12-24 14:13:13.940784938 +0800
+++ drbd-utils-8.9.5/user/v84/linux/drbd_genl.h	2015-12-24 14:16:30.426771679 +0800
@@ -239,6 +239,8 @@
 
 GENL_struct(DRBD_NLA_NEW_C_UUID_PARMS, 10, new_c_uuid_parms,
 	__flg_field(1, DRBD_GENLA_F_MANDATORY, clear_bm)
+    __flg_field(2, 0, zeroout_devices)
+    __flg_field(3, 0, discard_devices)
 )
 
 GENL_struct(DRBD_NLA_TIMEOUT_PARMS, 11, timeout_parms,