geom_label

I did "tunefs -L var /dev/ad4s1d" and changed /etc/fstab to use
/dev/ufs/var instead of /dev/ad4s1d.  It doesn't work.  During booting,
I get:

GEOM_LABEL: Label for provider ad4d is ufs/var.
...
Starting file system checks:
/dev/ad4s1a: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/ad4s1a: clean, ...
Can't stat /dev/ufs/var: No such file or directory
/dev/ad4s1e: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/ad4s1e: clean, ...
Can't stat /dev/ufs/var: No such file or directory
Can't stat /dev/ufs/var: No such file or directory
/dev/ufs/var: CAN'T CHECK FILE SYSTEM.
/dev/ufs/var: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.

Then it wants me to go into a shell in single-user mode.

I have a funny feeling that I'm trying to use geom_label for something
that it was totally not intended for.  =)  Either that, or I'm doing it
wrong.

Which is it?

--Emil