^^^ Warp Drive
ranjtech, I don't know how or when, but you have ended up with a filesystem larger than the slice on which it resides. I'm guessing someone was playing with fmthard, that being the case there is a reasonable chance that if you can put things back exactly as they were ( if you saved the prtvtoc from the source disk for example ) that you can recover the situation.
That being said you should have backups, the question of reinstallation should not even arise. If you don't have backups, it's time to start.