diff --git a/xCAT-server/share/xcat/install/rh/compute.rhels6.ppc64.tmpl b/xCAT-server/share/xcat/install/rh/compute.rhels6.ppc64.tmpl
index 50dc384f1..408597829 100644
--- a/xCAT-server/share/xcat/install/rh/compute.rhels6.ppc64.tmpl
+++ b/xCAT-server/share/xcat/install/rh/compute.rhels6.ppc64.tmpl
@@ -18,7 +18,7 @@ keyboard "us"
 #
 # Clear the MBR
 #
-zerombr yes
+zerombr
 
 #
 # Wipe out the disk
diff --git a/xCAT-server/share/xcat/install/rh/compute.rhels6.tmpl b/xCAT-server/share/xcat/install/rh/compute.rhels6.tmpl
index e1d433b08..047dc238c 100644
--- a/xCAT-server/share/xcat/install/rh/compute.rhels6.tmpl
+++ b/xCAT-server/share/xcat/install/rh/compute.rhels6.tmpl
@@ -17,7 +17,7 @@ keyboard "us"
 #
 # Clear the MBR
 #
-zerombr yes
+zerombr
 
 #
 # Wipe out the disk
diff --git a/xCAT-server/share/xcat/install/rh/compute_ad.rhels6.tmpl b/xCAT-server/share/xcat/install/rh/compute_ad.rhels6.tmpl
index 2a37d3eb4..3eb2bef53 100644
--- a/xCAT-server/share/xcat/install/rh/compute_ad.rhels6.tmpl
+++ b/xCAT-server/share/xcat/install/rh/compute_ad.rhels6.tmpl
@@ -17,7 +17,7 @@ keyboard "us"
 #
 # Clear the MBR
 #
-zerombr yes
+zerombr
 
 #
 # Wipe out the disk
diff --git a/xCAT-server/share/xcat/install/rh/hpc.rhels6.tmpl b/xCAT-server/share/xcat/install/rh/hpc.rhels6.tmpl
index e1d433b08..047dc238c 100644
--- a/xCAT-server/share/xcat/install/rh/hpc.rhels6.tmpl
+++ b/xCAT-server/share/xcat/install/rh/hpc.rhels6.tmpl
@@ -17,7 +17,7 @@ keyboard "us"
 #
 # Clear the MBR
 #
-zerombr yes
+zerombr
 
 #
 # Wipe out the disk
diff --git a/xCAT-server/share/xcat/install/rh/kvm.rhel6.tmpl b/xCAT-server/share/xcat/install/rh/kvm.rhel6.tmpl
index e1d433b08..047dc238c 100644
--- a/xCAT-server/share/xcat/install/rh/kvm.rhel6.tmpl
+++ b/xCAT-server/share/xcat/install/rh/kvm.rhel6.tmpl
@@ -17,7 +17,7 @@ keyboard "us"
 #
 # Clear the MBR
 #
-zerombr yes
+zerombr
 
 #
 # Wipe out the disk
diff --git a/xCAT-server/share/xcat/install/rh/kvm.rhels6.tmpl b/xCAT-server/share/xcat/install/rh/kvm.rhels6.tmpl
index e1d433b08..047dc238c 100644
--- a/xCAT-server/share/xcat/install/rh/kvm.rhels6.tmpl
+++ b/xCAT-server/share/xcat/install/rh/kvm.rhels6.tmpl
@@ -17,7 +17,7 @@ keyboard "us"
 #
 # Clear the MBR
 #
-zerombr yes
+zerombr
 
 #
 # Wipe out the disk
diff --git a/xCAT-server/share/xcat/install/rh/service.raid1.multipath.rhel6.ppc64.tmpl b/xCAT-server/share/xcat/install/rh/service.raid1.multipath.rhel6.ppc64.tmpl
index 57adf0afc..a7e674f6e 100644
--- a/xCAT-server/share/xcat/install/rh/service.raid1.multipath.rhel6.ppc64.tmpl
+++ b/xCAT-server/share/xcat/install/rh/service.raid1.multipath.rhel6.ppc64.tmpl
@@ -18,7 +18,7 @@ keyboard "us"
 #
 # Clear the MBR
 #
-zerombr yes
+zerombr
 
 #
 # Wipe out the disk
diff --git a/xCAT-server/share/xcat/install/rh/service.raid1.rhel6.ppc64.tmpl b/xCAT-server/share/xcat/install/rh/service.raid1.rhel6.ppc64.tmpl
index 8cf0428e3..b58225254 100644
--- a/xCAT-server/share/xcat/install/rh/service.raid1.rhel6.ppc64.tmpl
+++ b/xCAT-server/share/xcat/install/rh/service.raid1.rhel6.ppc64.tmpl
@@ -18,7 +18,7 @@ keyboard "us"
 #
 # Clear the MBR
 #
-zerombr yes
+zerombr
 
 #
 # Wipe out the disk
diff --git a/xCAT-server/share/xcat/install/rh/service.rhels6.ppc64.tmpl b/xCAT-server/share/xcat/install/rh/service.rhels6.ppc64.tmpl
index 149255612..509483367 100644
--- a/xCAT-server/share/xcat/install/rh/service.rhels6.ppc64.tmpl
+++ b/xCAT-server/share/xcat/install/rh/service.rhels6.ppc64.tmpl
@@ -18,7 +18,7 @@ keyboard "us"
 #
 # Clear the MBR
 #
-zerombr yes
+zerombr
 
 #
 # Wipe out the disk