On Wed, 12 May 1999, Ignatios Souvatzis wrote:

: > Note that there's a key difference between unionfs and the MOUNT_UNION
: > option: `mount -o union' only unions the top-level mounted-on
: > directory, while `mount -t union' unions stuff further down in the
: > tree..
: 
: Directory tree or mount tree?

"mount -o union" acts in a way that does no "copyup" action.  Directories in
the upper layer receive files and new directories created inside them;
directories only in the lower layer receive files and directories created
inside those.

At least, this is my perception of the -o union option.  :)

-- 
-- Todd Vierling (Personal tv@pobox.com; Bus. todd_vierling@xn.xerox.com)