John Hayward writes:
> Dear Vax People,
>    I attempted to do a union mount under 1.5 Alpha2 kernel and get
> operation not supported.  I assume the union facility was not included in
> building the kernel.

For me it worked just out of the box. "mount" displays:
gummo:/usr/ports/distfiles on /usr/pkgsrc/distfiles type nfs (read-only, union)
harpo:/x/tmp/distfiles on /usr/pkgsrc/distfiles type nfs (read-only, union)

Ciao,
	bertram

PS: m90# uname -a
NetBSD m90 1.5_ALPHA2 NetBSD 1.5_ALPHA2 (GENERIC) #1: Tue Sep 12 09:14:10 PDT 2000     matt@cheetah.local:/other/vax/kobj/GENERIC vax