diff --git a/plugins/other/smart-by-id_ b/plugins/other/smart-by-id_
index f6ddb4c3..14cf3b1e 100755
--- a/plugins/other/smart-by-id_
+++ b/plugins/other/smart-by-id_
@@ -1,6 +1,7 @@
 #!/bin/bash
 
-DISK=${0/*smart-by-id_/}
+DISK="${0/*smart-by-id_/}"
+SMARTCTL="smartctl $SMARTOPTS"
 
 echo "# $DISK"
 
@@ -12,39 +13,39 @@ config)
     echo 'graph_vlabel Attribute S.M.A.R.T value'
     echo 'graph_args --base 1000 --lower-limit 0'
     echo 'graph_category disk'
-    echo 'graph_info This graph shows the value of all S.M.A.R.T attributes of drive '`smartctl -i /dev/disk/by-id/$DISK | grep -Ei 'model|serial|firmware' | sed -re 's/.+?: +//gm' | tr '\n' ' '`
+    echo 'graph_info This graph shows the value of all S.M.A.R.T attributes of drive '`$SMARTCTL -i /dev/disk/by-id/$DISK | grep -Ei 'model|serial|firmware' | sed -re 's/.+?: +//gm' | tr '\n' ' '`
     echo 'smartctl_exit_status.label smartctl exit value'
     echo 'smartctl_exit_status.draw LINE2'
     echo 'smartctl_exit_class.label smartctl exit status'
     echo 'smartctl_exit_class.draw AREA'
     echo 'smartctl_exit_class.warning :0'
     echo 'smartctl_exit_class.critical :1'
-    
-    smartctl -A /dev/disk/by-id/$DISK | grep 0x | while read
+
+    $SMARTCTL -A /dev/disk/by-id/$DISK | grep 0x | while read
     do
-	OP=($REPLY)
-	ON=`echo ${OP[1]} | sed -e 's/-/_/g'`
-	OL=`echo ${OP[1]} | sed -e 's/_/ /g'`
-	echo ${ON}.label ${OL}
-	echo ${ON}.draw LINE2 | sed -e 's/-/_/g'
-	echo ${ON}.critical ${OP[5]}: | sed -e 's/-/_/g'
+        OP=($REPLY)
+        ON=`echo -n ${OP[1]} | tr -c '[A-z0-9]' '_'`
+        OL=`echo -n ${OP[1]} | tr '_' ' '`
+        echo ${ON}.label ${OL}
+        echo ${ON}.draw LINE2
+        echo ${ON}.critical $((${OP[5]})):
     done 
     ;;
 suggest)
     ls -1 /dev/disk/by-id/scsi-* | grep -v part | grep -o scsi.*
     ;;
 "")
-    smartctl -a /dev/disk/by-id/$DISK &> /dev/null
+    $SMARTCTL -a /dev/disk/by-id/$DISK &> /dev/null
     SES=$?
     echo "smartctl_exit_status.value $SES"
     if [ $SES -gt 0 ]
     then
-	if [ $((SES & 7)) -gt 0 ] ; then exit 1 ; fi
-	if [ $((SES & 24)) -gt 0 ] ; then SES=2 ; fi
-	if [ $((SES & 224)) -gt 0 ] ; then SES=1 ; fi
+        if [ $((SES & 7)) -gt 0 ] ; then exit 1 ; fi
+        if [ $((SES & 24)) -gt 0 ] ; then SES=2 ; fi
+        if [ $((SES & 224)) -gt 0 ] ; then SES=1 ; fi
     fi
     echo "smartctl_exit_class.value $SES"
-    smartctl -A /dev/disk/by-id/$DISK | grep 0x | awk '{ print $2.".value",$4; }' | sed -e 's/-/_/g'
+    $SMARTCTL -A /dev/disk/by-id/$DISK | awk '/0x/ { gsub(/[^a-Z0-9]/,"_",$2); print $2.".value",$4; }'
     ;;
 esac