+instance=$1
+disk=$2
+test -z "$backup" && backup="backup"
+test -z "$rsync_server" && rsync_server="lib15"
+
+if [ "$1" = '-' ] ; then
+ read instance disk
+elif [ -z "$instance" -o -z "$disk" ] ; then
+ echo "Usage: $0 instance disk"
+ exit 1
+fi
+
+test -z "$instance" && exit 1
+
+instance=`gnt-instance list --no-headers -o name $instance | head -1`