Help with install

[Andrew Falanga <afalanga_(_at_)_syracusenetworks_(_dot_)_com>]

It's me again folks.  Well, I decided that it was really stupid of
me to try installing OpenBSD onto a production computer at work. 
Especially, since it is my first time.  So, I'm trying to install
on an old system that I had at home.  A 486dx-33, arcaic I know, but
it will suffice.  Now, here's the problem.  I'm getting the same
error here that I was in the other attempts, but this time I'm wanting
to use the whole disk drive for OpenBSD.  I'm not trying to run multiple
OS's.  I get the error, Error mounting filesystem on /dev/wd0a on
/mnt.  What is going on?  Please forgive my ignorance. 
I am a beginner at the OpenBSD thing.

Andrew Falanga
 Syracuse Networks.Com