diff --git a/xCAT-server/lib/xcat/plugins/anaconda.pm b/xCAT-server/lib/xcat/plugins/anaconda.pm
index 41ddb29a3..1ed0c468e 100644
--- a/xCAT-server/lib/xcat/plugins/anaconda.pm
+++ b/xCAT-server/lib/xcat/plugins/anaconda.pm
@@ -34,6 +34,7 @@ my $httpport="80";
 my $useflowcontrol="0";
 
 
+
 sub handled_commands
 {
     return {
@@ -62,7 +63,7 @@ sub preprocess_request
     my @ents = xCAT::TableUtils->get_site_attribute("sharedtftp");
     my $site_ent = $ents[0];
     unless (  defined($site_ent)
-            and ($site_ent =~ /no/i or $site_ent =~ /0/))
+            and ($site_ent eq "no" or $site_ent eq "NO"  or $site_ent eq "0"))
     {
 
         #unless requesting no sharedtftp, don't make hierarchical call
diff --git a/xCAT-server/lib/xcat/plugins/debian.pm b/xCAT-server/lib/xcat/plugins/debian.pm
index 6908d4188..96225a518 100644
--- a/xCAT-server/lib/xcat/plugins/debian.pm
+++ b/xCAT-server/lib/xcat/plugins/debian.pm
@@ -77,7 +77,7 @@ sub preprocess_request
     ($sent) = $stab->getAttribs({key => 'sharedtftp'}, 'value');
     unless (    $sent
             and defined($sent->{value})
-            and ($sent->{value} =~ /no/i or $sent->{value} =~ /0/))
+             and ($sent->{value} eq "no" or $sent->{value} eq "NO" or $sent->{value} eq "0"))
     {
 
         #unless requesting no sharedtftp, don't make hierarchical call
diff --git a/xCAT-server/lib/xcat/plugins/pxe.pm b/xCAT-server/lib/xcat/plugins/pxe.pm
index 0e69e63d7..31c7fcab7 100644
--- a/xCAT-server/lib/xcat/plugins/pxe.pm
+++ b/xCAT-server/lib/xcat/plugins/pxe.pm
@@ -328,7 +328,7 @@ sub preprocess_request {
    #my $sent = $stab->getAttribs({key=>'sharedtftp'},'value');
    my @entries =  xCAT::TableUtils->get_site_attribute("sharedtftp");
    my $t_entry = $entries[0];
-   if ( defined($t_entry) and ($t_entry == 0 or $t_entry =~ /no/i)) {
+   if ( defined($t_entry)  and ($t_entry eq "0" or $t_entry eq "no" or $t_entry eq "NO")) {
       # check for  computenodes and servicenodes from the noderange, if so error out
       my @SN;
       my @CN;
diff --git a/xCAT-server/lib/xcat/plugins/toolscenter.pm b/xCAT-server/lib/xcat/plugins/toolscenter.pm
index a8ef36118..70c500605 100644
--- a/xCAT-server/lib/xcat/plugins/toolscenter.pm
+++ b/xCAT-server/lib/xcat/plugins/toolscenter.pm
@@ -68,9 +68,10 @@ sub preprocess_request
     my @entries =  xCAT::TableUtils->get_site_attribute("sharedtftp");
     my $t_entry = $entries[0];
     unless (  defined($t_entry)
-            and ($t_entry =~ /no/i or $t_entry =~ /0/))
+            and ($t_entry eq "no" or $t_entry eq "NO"  or $t_entry eq "0"))
     {
 
+
         #unless requesting no sharedtftp, don't make hierarchical call
         return [$req];
     }
diff --git a/xCAT-server/lib/xcat/plugins/vsmppxe.pm b/xCAT-server/lib/xcat/plugins/vsmppxe.pm
index 89e7b1485..46e097522 100644
--- a/xCAT-server/lib/xcat/plugins/vsmppxe.pm
+++ b/xCAT-server/lib/xcat/plugins/vsmppxe.pm
@@ -260,7 +260,7 @@ sub preprocess_request {
 
    my @entries =  xCAT::TableUtils->get_site_attribute("sharedtftp");
    my $t_entry = $entries[0];
-   if ( defined($t_entry) and ($t_entry == 0 or $t_entry =~ /no/i)) {
+   if ( defined($t_entry)  and ($t_entry eq "0" or $t_entry eq "no" or $t_entry eq "NO")) {
       # check for  computenodes and servicenodes from the noderange, if so error out
       my @SN;
       my @CN;
diff --git a/xCAT-server/lib/xcat/plugins/xnba.pm b/xCAT-server/lib/xcat/plugins/xnba.pm
index 8ce1c116a..114283c92 100644
--- a/xCAT-server/lib/xcat/plugins/xnba.pm
+++ b/xCAT-server/lib/xcat/plugins/xnba.pm
@@ -348,27 +348,27 @@ sub preprocess_request {
    #they specify no sharedtftp in site table
    my @entries =  xCAT::TableUtils->get_site_attribute("sharedtftp");
    my $t_entry = $entries[0];
-   if ( defined($t_entry) and ($t_entry == 0 or $t_entry =~ /no/i)) {
+   if ( defined($t_entry)  and ($t_entry eq "0" or $t_entry eq "no" or $t_entry eq "NO")) {
       # check for  computenodes and servicenodes from the noderange, if so error out
       my @SN;
       my @CN;
       xCAT::ServiceNodeUtils->getSNandCPnodes(\@$nodes, \@SN, \@CN);
       unless (($args[0] eq 'stat') or ($args[0] eq 'enact')) { # mix is ok for these options
-        if ((@SN > 0) && (@CN >0 )) { # there are both SN and CN
+       if ((@SN > 0) && (@CN >0 )) { # there are both SN and CN
             my $rsp;
             $rsp->{data}->[0] =
               "Nodeset was run with a noderange containing both service nodes and compute nodes. This is not valid. You must submit with either compute nodes in the noderange or service nodes. \n";
             xCAT::MsgUtils->message("E", $rsp, $callback1);
             return;
 
-        }
+         }
       }
 
       $req->{'_disparatetftp'}=[1];
       if ($req->{inittime}->[0]) {
           return [$req];
       }
-      if (@CN >0 ) { # there are computenodes then run on all servicenodes 
+      if (@CN >0 ) { # if compute nodes broadcast to all servicenodes
         return xCAT::Scope->get_broadcast_scope($req,@_);
       }
    }
diff --git a/xCAT-server/lib/xcat/plugins/yaboot.pm b/xCAT-server/lib/xcat/plugins/yaboot.pm
index b90c6df25..73cbd6d5e 100644
--- a/xCAT-server/lib/xcat/plugins/yaboot.pm
+++ b/xCAT-server/lib/xcat/plugins/yaboot.pm
@@ -379,7 +379,8 @@ sub preprocess_request {
    #if they specify no sharedtftp in site table
    my @entries =  xCAT::TableUtils->get_site_attribute("sharedtftp");
    my $t_entry = $entries[0];
-   if ( defined($t_entry)  and ($t_entry == 0 or $t_entry =~ /no/i)) {
+   
+   if ( defined($t_entry)  and ($t_entry eq "0" or $t_entry eq "no" or $t_entry eq "NO")) {
       # check for  computenodes and servicenodes from the noderange, if so error out
       my @SN;
       my @CN;