case $((snapminutes2 % window)) in
         0) ;;
         *)
-          snapname=$(echo "$snapshot" |
-                       sed 's,/\(.*\)/.zfs/snapshot/\(.*\),\1@\2,')
+          snapname=${filesystem}$(echo "$snapshot" |
+                                  sed 's,/\(.*\)/.zfs/snapshot/\(.*\),@\2,')
           destroy "$snapname"
         ;;
       esac
     window=$((window*2))
   done
   if [ $maxagedays -gt 0 ] && [ $age -gt $((maxagedays * 24 * 60)) ]; then
-    snapname=$(echo "$snapshot" |
-                     sed 's,/\(.*\)/.zfs/snapshot/\(.*\),\1@\2,')
+    snapname=${filesystem}$(echo "$snapshot" |
+                            sed 's,/\(.*\)/.zfs/snapshot/\(.*\),@\2,')
     destroy "$snapname"
   fi
 done
 
 #              running at any given time. This serializes the zfs 
 #              scrub process for any pool.
 
+exec >> /var/log/zfs/zfs-scrub.log 2>&1
+
 PATH=/usr/sbin:/sbin:/etc/bin:$PATH
 
 pools="$*"