diff --git a/installer/x86_64/install.sh b/installer/x86_64/install.sh
index 949c052acb8..91dd57a74ba 100755
--- a/installer/x86_64/install.sh
+++ b/installer/x86_64/install.sh
@@ -163,11 +163,21 @@ create_demo_gpt_partition()
         while read -r part_index; do
             if [ "$blk_dev$part_index" = "$cur_part" ]; then continue; fi
             echo "deleting partition $part_index ..."
+            # if the partition is already mounted, umount first
+            df $blk_dev$part_index 2>/dev/null && {
+                umount $blk_dev$part_index || {
+                    echo "Error: Unable to umount $blk_dev$part_index"
+                    exit 1
+                }
+            }
             sgdisk -d $part_index $blk_dev || {
                 echo "Error: Unable to delete partition $part_index on $blk_dev"
                 exit 1
             }
-            partprobe
+            partprobe || {
+                echo "Error: Unable to partprobe"
+                exit 1
+            }
         done < $tmpfifo
     fi
 
diff --git a/src/sonic-config-engine/minigraph.py b/src/sonic-config-engine/minigraph.py
index f989129a439..fb098cee326 100644
--- a/src/sonic-config-engine/minigraph.py
+++ b/src/sonic-config-engine/minigraph.py
@@ -207,11 +207,15 @@ def parse_dpg(dpg, hname):
                                  'type': 'MIRROR' if is_mirror else 'L3'}
             else:
                 # This ACL has no interfaces to attach to -- consider this a control plane ACL
-                aclservice = aclintf.find(str(QName(ns, "Type"))).text
-                acls[aclname] = {'policy_desc': aclname,
-                                 'ports': acl_intfs,
-                                 'type': 'CTRLPLANE',
-                                 'service': aclservice if aclservice is not None else 'UNKNOWN'}
+                try:
+                    aclservice = aclintf.find(str(QName(ns, "Type"))).text
+                    acls[aclname] = {'policy_desc': aclname,
+                                     'ports': acl_intfs,
+                                     'type': 'CTRLPLANE',
+                                     'service': aclservice if aclservice is not None else 'UNKNOWN'}
+                except:
+                    print >> sys.stderr, "Warning: Ingore Control Plane ACL %s without type" % aclname
+
         return intfs, lo_intfs, mgmt_intf, vlans, vlan_members, pcs, acls
     return None, None, None, None, None, None, None
 
diff --git a/src/sonic-config-engine/tests/t0-sample-graph.xml b/src/sonic-config-engine/tests/t0-sample-graph.xml
index f3d05cbc22c..a12605c8c3e 100644
--- a/src/sonic-config-engine/tests/t0-sample-graph.xml
+++ b/src/sonic-config-engine/tests/t0-sample-graph.xml
@@ -271,6 +271,20 @@
           <InAcl>SNMP_ACL</InAcl>
           <Type>SNMP</Type>
         </AclInterface>
+        <AclInterface>
+          <AttachTo>NTP</AttachTo>
+          <InAcl>NTP_ACL</InAcl>
+          <Type>NTP</Type>
+        </AclInterface>
+        <AclInterface>
+          <AttachTo>SSH</AttachTo>
+          <InAcl>SSH_ACL</InAcl>
+          <Type>SSH</Type>
+        </AclInterface>
+        <AclInterface>
+          <AttachTo>NTP</AttachTo>
+          <InAcl>NTP_ACL</InAcl>
+        </AclInterface>
       </AclInterfaces>
       <DownstreamSummaries/>
       <DownstreamSummarySet xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.Search.Autopilot.Evolution"/>
diff --git a/src/sonic-config-engine/tests/test_cfggen.py b/src/sonic-config-engine/tests/test_cfggen.py
index d187cfd26b8..64162e49417 100644
--- a/src/sonic-config-engine/tests/test_cfggen.py
+++ b/src/sonic-config-engine/tests/test_cfggen.py
@@ -16,9 +16,13 @@ def setUp(self):
         self.sample_device_desc = os.path.join(self.test_dir, 'device.xml')
         self.port_config = os.path.join(self.test_dir, 't0-sample-port-config.ini')
 
-    def run_script(self, argument):
+    def run_script(self, argument, check_stderr=False):
         print '\n    Running sonic-cfggen ' + argument
-        output = subprocess.check_output(self.script_file + ' ' + argument, shell=True)
+        if check_stderr:
+            output = subprocess.check_output(self.script_file + ' ' + argument, stderr=subprocess.STDOUT, shell=True)
+        else:
+            output = subprocess.check_output(self.script_file + ' ' + argument, shell=True)
+
         linecount = output.strip().count('\n')
         if linecount <= 0:
             print '    Output: ' + output.strip()
@@ -73,10 +77,12 @@ def test_render_template(self):
 
     def test_minigraph_acl(self):
         argument = '-m "' + self.sample_graph_t0 + '" -p "' + self.port_config + '" -v ACL_TABLE'
-        output = self.run_script(argument)
-        self.assertEqual(output.strip(), "{'SNMP_ACL': {'type': 'CTRLPLANE', 'policy_desc': 'SNMP_ACL', 'service': 'SNMP', 'ports': []},"
-                                         " 'DATAACL': {'type': 'L3', 'policy_desc': 'DATAACL', 'ports': ['Ethernet112', 'Ethernet116', 'Ethernet120', 'Ethernet124']}}")
-
+        output = self.run_script(argument, True)
+        self.assertEqual(output.strip(), "Warning: Ingore Control Plane ACL NTP_ACL without type\n"
+                                         "{'SSH_ACL': {'type': 'CTRLPLANE', 'policy_desc': 'SSH_ACL', 'service': 'SSH', 'ports': []},"
+                                         " 'SNMP_ACL': {'type': 'CTRLPLANE', 'policy_desc': 'SNMP_ACL', 'service': 'SNMP', 'ports': []},"
+                                         " 'DATAACL': {'type': 'L3', 'policy_desc': 'DATAACL', 'ports': ['Ethernet112', 'Ethernet116', 'Ethernet120', 'Ethernet124']},"
+                                         " 'NTP_ACL': {'type': 'CTRLPLANE', 'policy_desc': 'NTP_ACL', 'service': 'NTP', 'ports': []}}")
     def test_minigraph_everflow(self):
         argument = '-m "' + self.sample_graph_t0 + '" -p "' + self.port_config + '" -v MIRROR_SESSION'
         output = self.run_script(argument)