diff --git a/src/sunstone/public/app/tabs/provision-tab.js b/src/sunstone/public/app/tabs/provision-tab.js
index 87433865df..a32cc46a7d 100644
--- a/src/sunstone/public/app/tabs/provision-tab.js
+++ b/src/sunstone/public/app/tabs/provision-tab.js
@@ -979,7 +979,6 @@ define(function(require) {
                   $(".provision_capacity_selector", create_vm_context),
                   template_json.VMTEMPLATE);
 
-                that.original_disks = jQuery.extend(true, {}, template_json.VMTEMPLATE.TEMPLATE.DISK);
                 var disksContext = $(".provision_disk_selector", create_vm_context);
                 disksContext.data("template_json", template_json);
 
@@ -1091,29 +1090,13 @@ define(function(require) {
           var vm_name = $("#vm_name", context).val();
           var nics = NicsSection.retrieve(context);
 
-          var odisks = that.original_disks;
-          if (!Array.isArray(odisks)){
-            odisks = [odisks];
-          }
           var disks = DisksResize.retrieve($(".provision_disk_selector", context));
-          $.each(disks, function(dkey, dvalue){
-            $.each(odisks, function(okey, ovalue){
-              if (dvalue.DISK_ID == ovalue.DISK_ID && dvalue.IMAGE_ID){
-                if (dvalue.SIZE != ovalue.SIZE) {
-                  var disk = { IMAGE_ID: dvalue.IMAGE_ID, SIZE: dvalue.SIZE };
-                } else {
-                  var disk = { IMAGE_ID: dvalue.IMAGE_ID };
-                }
-                disks[dkey] = disk;
-              }
-            });
-          });
 
           var extra_info = {
             'vm_name' : vm_name,
             'template': {
             }
-          }
+          };
 
           var vmgroup = VMGroupSection.retrieve($(".vmgroupContext"+ template_id));
 
diff --git a/src/sunstone/public/app/utils/disks-resize.js b/src/sunstone/public/app/utils/disks-resize.js
index a977f1b4a7..a1bef4368b 100644
--- a/src/sunstone/public/app/utils/disks-resize.js
+++ b/src/sunstone/public/app/utils/disks-resize.js
@@ -125,6 +125,7 @@ define(function(require){
             '</div>' +
           '</div>').appendTo($(".disksContainer", disksContext));
         if (disks_base) {
+          disks_base[disk_id].SIZE = disk.SIZE;
           diskContext.data('template_disk', disks_base[disk_id]);
         }
 
@@ -222,14 +223,17 @@ define(function(require){
         disk = $(this).data("template_disk");
 
         var fields = WizardFields.retrieve(this);
-
-        if (fields.SIZE != undefined){
-          disk['SIZE'] = fields.SIZE;
+        if (disk["SIZE"] && fields["SIZE"] && disk["SIZE"] === fields["SIZE"]){
+          delete disk["SIZE"];
+          disks.push(disk);
+        }
+        else if (fields.SIZE != undefined){
+          var size = $.extend(true, [], fields.SIZE);
+          var size = size.join("");
+          var diskAux = $.extend(true, {}, disk);
+          diskAux["SIZE"] = fields.SIZE;
+          disks.push(diskAux);
         }
-      }
-
-      if (disk) {
-        disks.push(disk);
       }
     });