newfs for insufficient inodes file system

[Gregory Bond]

Urk, running newfs on /usr (or /) is major-league, heavy-duty,
potential-foot-shooting time.  Be VERY VERY careful. In fact, if you have to
ask how, there is a pretty good chance you'll wind up hopping and bleeding.

First step is to run "df -i" and see what the current space/inode usage is.
Then check if the standard newfs params look OK (i.e. /usr currently has
substantially fewer than the 5x21504 inodes newfs would create in use.) 

Overall the best bet is probably to back up all the data and re-install, using 
adjusted newfs parameters if necessary.