-fs mkm /afs/hcoop.net/old/user/$PATHBITS user.$USER.backup
-fs mkm /afs/hcoop.net/old/mail/$PATHBITS mail.$USER.backup
+test -e /afs/hcoop.net/old/user/$PATHBITS || \
+ fs mkm /afs/hcoop.net/old/user/$PATHBITS user.$USER.backup
+test -e /afs/hcoop.net/old/mail/$PATHBITS || \
+ fs mkm /afs/hcoop.net/old/mail/$PATHBITS mail.$USER.backup