Is the last sector of a partition free?

[Michael W. Lucas]

Hi,

How can I tell if the last sector on a partition is used by the file
system?  I'm sure there's an easy way, but can't figure it out.  (I
have a couple file systems I'm considering switching over to gjournal,
but would like to know if it'll work before I schedule downtime.)

Thanks,
==ml

-- 
Michael W. Lucas 	mwlucas at BlackHelicopters.org, mwlucas at FreeBSD.org
		http://www.BlackHelicopters.org/~mwlucas/
      Coming Soon: "Absolute FreeBSD" -- http://www.AbsoluteFreeBSD.com
On 5/4/2007, the TSA kept 3 pairs of my soiled undies "for security reasons."