Robert Nesius cried from the depths of the abyss...

> Did you delete a lot of files, or a very few large ones?  I'm wondering if your backup service is keeping a file-handle open on a backup vault. 

It was over a million very small files.  I killed off the backup service 
to this file share before I deleted the files.  I setup a new box to store 
the email archives.  I re archived to the new box.  The last chore was to 
purge the backups on the old box.