OH NO! IT says my root partition / is full but it isn't! Why is FreeBSD lying about space?

[Lowell Gilbert]

Try the FAQ entry titled "The du and df commands show different amounts
of disk space available. What is going on?".  You can find it at:
http://be-well.ilk.org/FreeBSD/doc/en_US.ISO8859-1/books/faq/disks.html#DU-VS-DF