I can't access the database now as my server provider is having a problem giving me the extra 1200 Mb of space.

Once I am connected again, will it be OK to reload that step?

You *should* be able to. It's a bit unknown where it died since it basically sounds like it ran out of space. If you have something like phpmyadmin installed, what I would do first is see how far it got by running the following command:

select * from ubbt_VERSION

that will tell you if it got to a certain step of the altertable before it hung up.

Seeing that I lost connection I have now reloaded that step and it is doing something and eating up space like crazy!

How long does it normally take to do this step?

Seeing that it looks like my backup attempt failed, which I didn't learn about until after I reached this step, I pray this works.

Is this the last step?

Yes, the altertable is the last step of the upgrade process.

How long it takes depends on the size of your forum. I wouldn't imagine it should take more than a few minutes on most forums.

Does it take very long to accomplish this last step?

My board runs in a timeout/ server error 500 while processing this step. I wait a minute, press reload and the process ends clearly. *lucky man*

You are, therefore, saying that this is the longest step?

How long is long?