diff --git a/xymon/plugins/client/ext/smart b/xymon/plugins/client/ext/smart
index 2e0c13d..c433436 100755
--- a/xymon/plugins/client/ext/smart
+++ b/xymon/plugins/client/ext/smart
@@ -3,22 +3,24 @@
 # NOTE: Must be run as root, so you probably need to setup sudo for this.
 
 if test -f /tmp/dres; then rm -f /tmp/dres; fi
+if test -f /tmp/dscan; then rm -f /tmp/dscan; fi
 
+# Get the list of all available devices
 smartctl --scan > /tmp/dscan
 
-# MODIFY below to match your setup - the "scsi-SATA" is pretty generic, but you
-# can add more disks if you like. E.g. I have a USB disk permanently plugged in.
-
-while read LINE
-do
+while IFS= read -r LINE; do
+	## Get device and type
 	DISK=$(echo "${LINE}" | cut -d" " -f1)
 	TYPE=$(echo "${LINE}" | cut -d" " -f3)
+
+	## Get SMART Health Status and return code
 	DRES=$(/usr/sbin/smartctl -H -d "${TYPE}" -n standby "${DISK}")
 	DCODE=$?
 	DSTBY=$(( DCODE & 2 ))
 	DFAIL=$(( DCODE & 8 ))
 	DWARN=$(( DCODE & 32 ))
 
+	## Give a weight to each to color to easily get the page status
 	if test $DSTBY -ne 0
 	then
 		COLOR="4&clear"
@@ -36,15 +38,16 @@ do
 
 	echo "${COLOR} $DISK ${TYPE}" | cut -c2- >>/tmp/dres
 	echo "" >>/tmp/dres
-	echo "$DRES" | egrep -v "^smartctl|^Copyright|^$|^===" >>/tmp/dres
+	echo "$DRES" | grep -v -E "^smartctl|^Copyright|^$|^===" >>/tmp/dres
 	echo "------------------------------------------------------------" >>/tmp/dres
 	echo "" >>/tmp/dres
 	echo "" >>/tmp/dres
 done < /tmp/dscan >/tmp/dcheck
 
+# Set the global color according to the highest alert
 COLOR=$(< /tmp/dcheck awk '{print $1}' | sort | uniq | head -1 | cut -c3-)
 
-$XYMON $XYMSRV "status ${MACHINE}.smart ${COLOR} SMART health check
+$XYMON "${XYMSRV}" "status ${MACHINE}.smart ${COLOR} SMART health check
 
 $(< /tmp/dcheck cut -c2-)