diff --git a/app/controllers/node_controller.rb b/app/controllers/node_controller.rb
index 778d597..eccb73a 100644
--- a/app/controllers/node_controller.rb
+++ b/app/controllers/node_controller.rb
@@ -1,75 +1,73 @@
 class NodeController < ApplicationController
     before_action :require_login
-  def index
-    @hosts = Array.new
-    @nodes = Node.all.order("id asc")
-    
-    @node_connects = Array.new
-    node_info = Hash.new
-    one_node = Node.take
-    
-    node_info["Hostname"] = one_node.host_name
-    node_info["State"] = "Peer in Cluster Disconnected"
-    node_info = Hash.new
-    
-    if !one_node.blank?
-      if ping_test?(one_node.host_ip)
-        command = String.new
-        command << "sshpass -p#{one_node.user_password} ssh #{one_node.user_name}@#{one_node.host_ip} gluster peer status info"
-        puts command
-        output = `#{command}`.split("\n")
-        output << "\n"
-  
-        output.each do |t|
-            next if t.equal? output.first
-            if t.include? ":"
-                temp = t.split(":")
-                node_info[temp[0]] = temp[1]
-            else
-                @node_connects << node_info
-                node_info = Hash.new
+    def index
+        @hosts = Array.new
+        @nodes = Node.all.order("id asc")
+        @node_connects = Array.new
+        node_info = Hash.new
+        begin
+            one_node = Node.take
+            node_info["Hostname"] = one_node.host_name
+            node_info["State"] = "Peer in Cluster Disconnected"
+            node_info = Hash.new
+
+            if !one_node.blank?
+                if ping_test?(one_node.host_ip)
+                    command = String.new
+                    command << "sshpass -p#{one_node.user_password} ssh #{one_node.user_name}@#{one_node.host_ip} gluster peer status info"
+                    puts command
+                    output = `#{command}`.split("\n")
+                    output << "\n"
+
+                    output.each do |t|
+                        next if t.equal? output.first
+                        if t.include? ":"
+                            temp = t.split(":")
+                            node_info[temp[0]] = temp[1]
+                        else
+                            @node_connects << node_info
+                            node_info = Hash.new
+                        end
+                    end
+
+                end
             end
+
+            if get_hosts.blank?
+                flash[:danger] = "Check Server"
+            else
+                @hosts = get_hosts
+            end
+        rescue => ex
+            puts ex
         end
-      
-      end
     end
-  
-    if get_hosts.blank?
-      flash[:danger] = "Check Server"
-    else
-      @hosts = get_hosts
+
+    def node_add
+        new_node = Node.new
+        new_node.host_name = params[:host_name]
+        new_node.host_ip = params[:host_ip]
+        new_node.user_name = params[:user_name]
+        new_node.user_password = params[:user_password]
+        new_node.save
+        redirect_to '/node/index'
     end
-  end
 
-  def get_hosts
-    return ['2', 'aaa', 'bbb', 'ccc']
-  end
+    def node_delete
+        one_node = Node.find(params[:node_id])
+        one_node.destroy
+        redirect_to '/node/index'
+    end
 
-  def node_add
-    new_node = Node.new
-    new_node.host_name = params[:host_name]
-    new_node.host_ip = params[:host_ip]
-    new_node.user_name = params[:user_name]
-    new_node.user_password = params[:user_password]
-    new_node.save
-    redirect_to '/node/index'
-  end
+    def node_prove
+        one_node = Node.find(params[:node_id])
+        puts "gluster peer probe #{one_node.host_name}"
+        redirect_to '/node/index'
+    end
 
-  def node_delete
-    one_node = Node.find(params[:node_id])
-    one_node.destroy
-    redirect_to '/node/index'
-  end
-  
-  def node_prove
-    one_node = Node.find(params[:node_id])
-    puts "gluster peer probe #{one_node.host_name}"
-    redirect_to '/node/index'
-  end
-  
-  def node_detach
-    one_node = Node.find(params[:node_id])
-    puts "gluster peer detach #{one_node.host_name}"
-    redirect_to '/node/index'
-  end
+    def node_detach
+        one_node = Node.find(params[:node_id])
+        puts "gluster peer detach #{one_node.host_name}"
+        redirect_to '/node/index'
+    end
 end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index a79846c..066c2af 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1,4 +1,5 @@
 module ApplicationHelper
+    require 'net/ping'
 
     def get_df
         df = Array.new
@@ -73,7 +74,7 @@ module ApplicationHelper
             du_each['file_name'] = "empty"
             du << du_each
         end
-        
+
         du.sort_by! { |k| k['usage'] }
         du.reverse!
         return du
@@ -136,4 +137,8 @@ module ApplicationHelper
         return files
     end
 
+    def ping_test?(host)
+      check = Net::Ping::External.new(host)
+      return check.ping?
+    end
 end
diff --git a/app/helpers/node_helper.rb b/app/helpers/node_helper.rb
index a0b203f..ff049b0 100644
--- a/app/helpers/node_helper.rb
+++ b/app/helpers/node_helper.rb
@@ -1,7 +1,2 @@
 module NodeHelper
-  require 'net/ping'
-  def ping_test?(host)
-    check = Net::Ping::External.new(host)
-    check.ping?
-  end
 end
diff --git a/app/views/home/index.html.erb b/app/views/home/index.html.erb
index 3028d33..8363148 100644
--- a/app/views/home/index.html.erb
+++ b/app/views/home/index.html.erb
@@ -105,7 +105,7 @@
 
 		<!-- file manager -->
 		<div class="col-md-8 col-sm-8 col-xs-12">
-			<div class="panel panel-body">
+			<div id="pagecontent" class="panel panel-body">
 				<div class="x_title" id="file_manager_title_div">
 					<h2 style="width:130px">File Manager</h2>
 				</div>
@@ -350,10 +350,13 @@ $(document).on("click", "#file_manager_div .chdir", function(){
 	var next_dir = current_dir + "/" + file_name;
 
 	$.ajax({
-		method: "post",
-		url: "/home/chdir",
-		data: { next_dir : next_dir },
-		success  : function(result){
+		method : "post",
+		url : "/home/chdir",
+		data : { next_dir : next_dir },
+		beforeSend : function(){
+			Pace.start();
+		},
+		success : function(result){
 			$("#current_dir").val(next_dir);
 			$("#file_manager_title_div").empty().append("<h2 style='width:130px'>File manager</h2>");
 			$("#disk_usage_title_div").empty().append("<h2 style='width:130px'>Disk usage</h2>");
@@ -362,6 +365,7 @@ $(document).on("click", "#file_manager_div .chdir", function(){
 
 			draw_datatable();
 			draw_chart(result.du);
+			Pace.stop();
 		}
 	})
 })
@@ -376,10 +380,13 @@ $(document).on("click", "#file_manager_div .chupper", function(){
 	var next_dir = current_dir.substring(0, lastindex);
 
 	$.ajax({
-		method: "POST",
-		url: "/home/chdir",
-		data: { next_dir : next_dir },
-		success  : function(result){
+		method : "POST",
+		url : "/home/chdir",
+		data : { next_dir : next_dir },
+		beforeSend : function(){
+			Pace.start();
+		},
+		success : function(result){
 			$("#current_dir").val(next_dir);
 			$("#file_manager_title_div").empty().append("<h2 style='width:130px'>File manager</h2>");
 			$("#disk_usage_title_div").empty().append("<h2 style='width:130px'>Disk usage</h2>");
@@ -388,6 +395,7 @@ $(document).on("click", "#file_manager_div .chupper", function(){
 
 			draw_datatable();
 			draw_chart(result.du);
+			Pace.stop();
 		}
 	})
 })
diff --git a/app/views/volume/index.html.erb b/app/views/volume/index.html.erb
index 0716312..e4446ea 100644
--- a/app/views/volume/index.html.erb
+++ b/app/views/volume/index.html.erb
@@ -87,11 +87,21 @@
         </div>
     </div>
     <div class="clearfix"></div>
+    <% nodes = Node.all %>
+    <% if nodes.length == 0 %>
+    <div class="row animated flipInX col-md-6 col-sm-9 col-xs-12">
+        <div class="alert alert-info" role="alert">
+            <span class="glyphicon glyphicon-bell" area-hidden="true"></span>
+            <span class="glyphicon-class">You don't have a node. Please add nodes to do something in this page.</span>
+        </div>
+    </div>
+    <% else %>
     <div class="row">
         <% volumes.each_with_index do |volume, index| %>
         <%= raw volume_info(volume, index) %>
-        <%end%>
+        <% end %>
     </div>
+    <% end %>
 </div>
 <!-- /page content -->