diff --git a/check_iostat b/check_iostat
index 43d2c02..f46678c 100644
--- a/check_iostat
+++ b/check_iostat
@@ -40,6 +40,8 @@ sub HELP_MESSAGE {
     print "\t-w <tps>,<read>,<wrtn>\tSets the WARNING level for tps, KB_read/s and KB_written/s, respectively\n";
     print "\t-C <percent>\t Sets the CRITICAL level for iowait\n";
     print "\t-W <percent>\t Sets the WARNING level for iowait\n";
+    print "\t-X <percent>\t Sets the CRITICAL level for utilization\n";
+    print "\t-Y <percent>\t Sets the WARNING level for utilization\n";
     print "\t\t\t(if no level is set for iowait, no warning is set for this value)\n";
     exit 1;
 }
@@ -51,13 +53,15 @@ unless ($iostat && -f $iostat) {
 
 # Getting parameters:
 my %opts;
-getopts('d:w:c:W:C:hv', \%opts);
+getopts('d:w:c:W:C:X:Y:hv', \%opts);
 
 my $disk = $opts{'d'};
 my $warning = $opts{'w'};
 my $critical = $opts{'c'};
 my $warning_iowait = $opts{'W'};
 my $critical_iowait = $opts{'C'};
+my $warning_util = $opts{'X'};
+my $critical_util = $opts{'Y'};
 
 VERSION_MESSAGE() if $opts{'v'};
 HELP_MESSAGE() if $opts{'h'};
@@ -89,16 +93,21 @@ if ($warn_tps > $crit_tps || $warn_read > $crit_read || $warn_written > $crit_wr
 }
 
 if ($warning_iowait && $critical_iowait && $warning_iowait > $critical_iowait) {
-    warn "ERROR: critical iowait level must be higher that warning level\n";
+    warn "ERROR: critical iowait level must be higher than warning level\n";
     HELP_MESSAGE();
 }
 
-my ($tps,$kbread,$kbwritten,$iowait);
+if ($warning_util && $critical_util && $warning_util > $critical_util) {
+    warn "ERROR: critical utilization level must be higher than warning level\n";
+    HELP_MESSAGE();
+}
+
+my ($tps,$rps,$wps,$kbread,$kbwritten,$iowait,$util);
 my $seen_usage = 0;
 my $seen_disk = 0;
 
 # Doing the actual check:
-open (IOSTAT,"-|","$iostat -k $disk 5 2");
+open (IOSTAT,"-|","$iostat -kx $disk 5 2");
 while (<IOSTAT>) {
     chomp();
     if (/^[0-9\.\ \t]+$/) {
@@ -112,7 +121,8 @@ while (<IOSTAT>) {
 	$seen_disk++;
 	next if $seen_disk < 2;
 	my (@stats) = split ('\s+', $_);
-        ($tps,$kbread,$kbwritten) = @stats[1,2,3];
+        ($rps,$wps,$kbread,$kbwritten,$util) = @stats[1,2,5,6,13];
+	$tps = $rps + $wps;
 	last;
     }
 }
@@ -132,6 +142,11 @@ if ($warning_iowait && $iowait >= $warning_iowait) {
    $status = 1;
 }
 
+if ($warning_util && $util >= $warning_util) {
+   $msg = "WARNING";
+   $status = 1;
+}
+
 if ($tps >= $crit_tps || $kbread >= $crit_read || $kbwritten >= $crit_written) {
    $msg = "CRITICAL";
    $status = 2;
@@ -142,9 +157,13 @@ if ($critical_iowait && $iowait >= $critical_iowait) {
    $status = 2;
 }
 
+if ($critical_util && $iowait >= $critical_util) {
+   $msg = "CRITICAL";
+   $status = 2;
+}
 
 # Printing the results:
-print "$msg - I/O stats tps=$tps KB_read/s=$kbread KB_written/s=$kbwritten iowait=$iowait | 'tps'=$tps; 'KB_read/s'=$kbread; 'KB_written/s'=$kbwritten; 'iowait'=$iowait\n";
+print "$msg - I/O stats tps=$tps KB_read/s=$kbread KB_written/s=$kbwritten iowait=$iowait util=$util | 'tps'=$tps; 'KB_read/s'=$kbread; 'KB_written/s'=$kbwritten; 'iowait'=$iowait; 'util'=$util\n";
 
 # Bye!
 exit $status;
diff --git a/monitoring-plugins-sar-perf.changes b/monitoring-plugins-sar-perf.changes
index ca96a35..9a76db6 100644
--- a/monitoring-plugins-sar-perf.changes
+++ b/monitoring-plugins-sar-perf.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Apr 24 12:33:08 CEST 2017 - ro@suse.de
+
+- use -x for iostat and add utilization monitoring 
+
 -------------------------------------------------------------------
 Fri Oct 30 15:01:40 UTC 2015 - lars@linux-schulserver.de
 
diff --git a/monitoring-plugins-sar-perf.spec b/monitoring-plugins-sar-perf.spec
index 78b31af..60efd3c 100644
--- a/monitoring-plugins-sar-perf.spec
+++ b/monitoring-plugins-sar-perf.spec
@@ -1,8 +1,7 @@
 #
 # spec file for package monitoring-plugins-sar-perf
 #
-# Copyright (c) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
-# Copyright (c) 2015 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -19,11 +18,11 @@
 
 Name:           monitoring-plugins-sar-perf
 Summary:        Get performance data from sar 
-Version:        0.1
-Release:        100
-Url:            https://github.com/nickanderson/check-sar-perf 
 License:        BSD-2-Clause
 Group:          System/Monitoring
+Version:        0.1
+Release:        0
+Url:            https://github.com/nickanderson/check-sar-perf 
 Source0:        nickanderson-check-sar-perf-4878d0c.tar.gz 
 Source1:        check_iostat
 Source2:        usr.lib.nagios.plugins.check_iostat
@@ -35,7 +34,8 @@ Recommends:     apparmor-profiles
 %endif
 Provides:       nagios-plugins-sar-perf = %{version}-%{release}
 Obsoletes:      nagios-plugins-sar-perf < %{version}-%{release}
-Requires:       python sysstat
+Requires:       python
+Requires:       sysstat
 BuildArch:      noarch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build