diff --git a/mkdumprd b/mkdumprd
index b866a9b..d062a91 100644
--- a/mkdumprd
+++ b/mkdumprd
@@ -94,7 +94,7 @@ to_mount() {
 #$1=dump target
 #called from while loop and shouldn't read from stdin, so we're using "ssh -n"
 get_ssh_size() {
-    local _opt _out _size
+    local _opt _out
     _opt="-i $SSH_KEY_LOCATION -o BatchMode=yes -o StrictHostKeyChecking=yes"
     _out=$(ssh -q -n $_opt $1 "df -P $SAVE_PATH")
     [ $? -ne 0 ] && {
@@ -102,8 +102,7 @@ get_ssh_size() {
     }
 
     #ssh output removed the line break, so print field NF-2
-    _size=$(echo -n $_out| awk '{avail=NF-2; print $avail}')
-    echo -n $_size
+    echo -n "$_out" | awk '{avail=NF-2; print $avail}'
 }
 
 #mkdir if save path does not exist on ssh dump target
@@ -134,14 +133,13 @@ mkdir_save_path_ssh()
 #Function: get_fs_size
 #$1=dump target
 get_fs_size() {
-    local _mnt=$(get_mntpoint_from_target $1)
-    echo -n $(df -P "${_mnt}/$SAVE_PATH"|tail -1|awk '{print $4}')
+    df -P "$(get_mntpoint_from_target "$1")/$SAVE_PATH"|tail -1|awk '{print $4}'
 }
 
 #Function: get_raw_size
 #$1=dump target
 get_raw_size() {
-        echo -n $(fdisk -s "$1")
+    fdisk -s "$1"
 }
 
 #Function: check_size