> Are you mounting an mfs partition (e.g, as /tmp)?  If so, that warning
> is actually from mount_mfs(8) creating /tmp, not mount_ffs(8) mounting
> your ffs file systems.  The warning in mount_mfs(8) has been removed in
> newfs/mkfs.c revision 1.59, which I committed on 2001/12/31.

Yes, you're right. I also mount mfs as /tmp.
I will try to rebuild it later.
Thanks for your answer!

Regards
-rxg