I was wondering about that. Could that be tapped into?

I would think it would be a lot easier just to have a larger initial partition (if possible). Given the significantly larger hard drives out there today (compared with the original 6GB drives of the Mark 1), the extra partition space is not really going to hurt capacity much.

But going to the second drive (if available) would prevent people from having to rebuild partition tables and starting over.

Hmmm... Tradeoffs either way...