diff --git a/dsmon.sh b/dsmon.sh
index ad4c00d..d36e335 100755
--- a/dsmon.sh
+++ b/dsmon.sh
@@ -140,7 +140,7 @@ CHECK(){
 				dname=${dname//\/dev\/mapper\//}
 				dname=${dname//\/dev\//}
 				dname_short=${dname#*vg-}
-				dname_short=${dname%*_v}
+				dname_short=${dname_short%*_v}
 				[ "$dname_short" = "" ] && dname_short=$dname
 
 				if [ "${dname}" = "sda1" ] && [ ${DRIVEINFO[$((${ii}+1))]//M/} -lt 1024 ]; then