diff --git a/operation/configure_bootloader_cnf.sh b/operation/configure_bootloader_cnf.sh
index 57de7e5..4c30d42 100755
--- a/operation/configure_bootloader_cnf.sh
+++ b/operation/configure_bootloader_cnf.sh
@@ -106,7 +106,7 @@ EOF
 	if [[ "$devname" =~ ^md[0-9]*$ ]];then
 		root_dev="$ROOT_PARTITION"
 	else
-		by_uuid=$(get_disk_sym $devname "by-uuid")
+		by_uuid=$(get_disk_sym $ROOT_PARTITION "by-uuid")
 		if [ -n "$by_uuid" ];then
 			root_dev="UUID=$(echo $by_uuid|sed 's/.*\///')"
 		else
diff --git a/operation/configure_fstab.sh b/operation/configure_fstab.sh
index 051ba79..b3ae686 100755
--- a/operation/configure_fstab.sh
+++ b/operation/configure_fstab.sh
@@ -48,7 +48,7 @@ configure_fstab ()
 	local fs_mntops="$4"
 	local fs_freq="$5"
 	local fs_passno="$6"
-	# store uuid of by-id
+	# store uuid or by-id
 	local devname=""
 
 
@@ -58,16 +58,15 @@ configure_fstab ()
 	# if partition not exist, or couldn't get partition information
 	# set $devname as default
 
-	partition=$(echo $device|sed 's/.*\///')
 	if [ "$mountpoint" == "swap" -a "$fs_type" == "swap" ];then
-		by_id=$(get_disk_sym $partition "by-id")
+		by_id=$(get_disk_sym $device "by-id")
 		if [ -n "$by_id" ];then
 			devname="/dev/$by_id"
 		else
 			devname="$device"
 		fi
 	else
-		by_uuid=$(get_disk_sym $partition "by-uuid")
+		by_uuid=$(get_disk_sym $device "by-uuid")
 		if [ -n "$by_uuid" ];then
 			devname="UUID=$(echo $by_uuid|sed 's/.*\///')"
 		else
diff --git a/operation/functions b/operation/functions
index f008532..6ac755b 100644
--- a/operation/functions
+++ b/operation/functions
@@ -116,7 +116,7 @@ update_udev()
 #
 # get device uuid/by-id/by-path info
 # if not found return NULL
-# ex: get_disk_sym sda1 by-uuid
+# ex: get_disk_sym /dev/sda1 by-uuid
 #
 get_disk_sym ()
 {
@@ -129,17 +129,14 @@ get_disk_sym ()
 	local type="$2"
 	local devname=""
 
-	# we find partition in /sys/block/,
-	# "*" in oder to c0d0p1 match cciss!c0d0p1
-	local path=$(find /sys/block/ -maxdepth 2 -name *$partition)
+	local path=$(udevadm info -q path -n $partition)
 
+	# if not update udev, uuid or by-id may use old one.
+	update_udev
 	# scsci's by-id may be have multi-links, we get first link
-	if [ -n "$path" -a  -d "$path" ];then
-		# update hard disk informations.
-		# if not update udev, uuid or by-id may use old one.
-		update_udev
-		devname=$(udevinfo -q symlink -p $path|tr " " "\n"|grep "$type"|head -n 1)
-	fi
+	# update hard disk informations.
+	devname=$(udevinfo -q symlink -p $path|tr " " "\n"|grep "$type"|head -n 1)
+
 	echo "$devname"
 
 }