Thread: Upgrade to 8.3

I think I just made a huge error.  I just upgraded all of my systems and in
the process I just upgraded the data base from 8.1 to 8.3.  At least I think
it was 8.1.  Anyway the postmaster won't run and I can't backup the old
database without a hue effort.  Is there a way around this or do I have to
reinstall the old server and back it up and then install the new version?

Thanks