use DECK SERIAL as a backup if the ltfs gives no TAPE SERIAL

mountlto

@@ -32,7 +32,15 @@ DECK=$(echo "$i - 1" | bc)
 if [ $(which ltfs_ldun) ] ; then
     ltfs_ldun load ${DECK} 1>/dev/null
 fi
-TAPE_SERIAL=$(ltfs -f -o devname="${DECK}" 2>&1 | grep "Volser(Barcode)" | cut -d: -f2 | awk '{print $1}')
+LOADTMP=$(_maketemp)
+ltfs -f -o devname="${DECK}" 2> "${LOADTMP}"
+TAPE_SERIAL=$(cat "${LOADTMP}" | grep "Volser(Barcode)" | cut -d: -f2 | awk '{print $1}')
+if [[ -z "$TAPE_SERIAL" ]] ; then
+    if [[ $(cat "${LOADTMP}" | grep "Mounting the volume") ]] ;then
+        DECKSERIAL=$(cat "$LOADTMP" | grep -o "serial number is [A-Za-z0-9]*" | awk '{print $4}' )
+        TAPE_SERIAL="${DECKSERIAL}"
+    fi
+fi
 if [[ -n "${TAPE_SERIAL}" ]] ;then
 echo "Deck ${DECK} found with tape ${TAPE_SERIAL}"
 if [[ $(uname -s) == "Darwin" ]] ; then