diff --git a/xCAT-server/lib/xcat/plugins/sles.pm b/xCAT-server/lib/xcat/plugins/sles.pm
index 7054fb6b3..0eb2e9a4d 100644
--- a/xCAT-server/lib/xcat/plugins/sles.pm
+++ b/xCAT-server/lib/xcat/plugins/sles.pm
@@ -1753,10 +1753,22 @@ sub copycd
         }
         if ($dsc =~ /Installer/ and $dsc =~ /SLE-15/) {
             $discnumber = 1;
-            unless ($distname) { $distname = "sle15" };
+            unless ($distname) {
+                if ($dsc =~ /SLE-15-SP(\d)/) {
+                    $distname = "sle15.$1";
+                } else {
+                    $distname = "sle15";
+                }
+            };
         } elsif ($dsc =~ /SLE-15/ and $dsc =~ /Packages/) {
             $discnumber = 2;
-            unless ($distname) { $distname = "sle15" };
+            unless ($distname) {
+                if ($dsc =~ /SLE-15-SP(\d)/) {
+                    $distname = "sle15.$1";
+                } else {
+                    $distname = "sle15";
+                }
+            };
         }
     }
 
diff --git a/xCAT-server/share/xcat/install/sles/compute.sle15.tmpl b/xCAT-server/share/xcat/install/sles/compute.sle15.tmpl
index b5254111d..4d9a5884e 100644
--- a/xCAT-server/share/xcat/install/sles/compute.sle15.tmpl
+++ b/xCAT-server/share/xcat/install/sles/compute.sle15.tmpl
@@ -12,7 +12,7 @@
     </bootloader>
     <general>
       <clock>
-        <hwclock>GMT</hwclock>
+        <hwclock>UTC</hwclock>
         <timezone>#TABLE:site:key=timezone:value#</timezone>
       </clock>
       <keyboard>
diff --git a/xCAT-server/share/xcat/install/sles/compute.sles12.tmpl b/xCAT-server/share/xcat/install/sles/compute.sles12.tmpl
index bf5a3764a..7062fedaa 100644
--- a/xCAT-server/share/xcat/install/sles/compute.sles12.tmpl
+++ b/xCAT-server/share/xcat/install/sles/compute.sles12.tmpl
@@ -12,7 +12,7 @@
     </bootloader>
     <general>
       <clock>
-        <hwclock>GMT</hwclock>
+        <hwclock>UTC</hwclock>
         <timezone>#TABLE:site:key=timezone:value#</timezone>
       </clock>
       <keyboard>
diff --git a/xCAT-server/share/xcat/install/sles/service.sle15.tmpl b/xCAT-server/share/xcat/install/sles/service.sle15.tmpl
index e75529258..b1ed324ea 100644
--- a/xCAT-server/share/xcat/install/sles/service.sle15.tmpl
+++ b/xCAT-server/share/xcat/install/sles/service.sle15.tmpl
@@ -12,7 +12,7 @@
     </bootloader>
     <general>
       <clock>
-        <hwclock>GMT</hwclock>
+        <hwclock>UTC</hwclock>
         <timezone>#TABLE:site:key=timezone:value#</timezone>
       </clock>
       <keyboard>
diff --git a/xCAT-server/share/xcat/install/sles/service.sles12.tmpl b/xCAT-server/share/xcat/install/sles/service.sles12.tmpl
index bf5a3764a..7062fedaa 100644
--- a/xCAT-server/share/xcat/install/sles/service.sles12.tmpl
+++ b/xCAT-server/share/xcat/install/sles/service.sles12.tmpl
@@ -12,7 +12,7 @@
     </bootloader>
     <general>
       <clock>
-        <hwclock>GMT</hwclock>
+        <hwclock>UTC</hwclock>
         <timezone>#TABLE:site:key=timezone:value#</timezone>
       </clock>
       <keyboard>