On Tue, Jul 29, 1997 at 10:43:41AM -0400, Matt Thomas wrote:
> 
> My filesystems are 4.4bsd.  I'd like to be able to do
> 
> 	mount -t union -o -b /usr/src ~/cvs/src
> 
> but I get union: Operation not supported.  Referencing to the man
> pages I think I'm doing everything right.  

Are you sure that you have 'file-system UNION' in your kernel config
file? I have a few seperate development trees set up exactly in this
way, and they work (within the limits of unionfs vnode locking problems).

- Frank