Comment 2 for bug 218918

I tried reproducing this by making a one-character change to the relevant code to trigger on 2GB rather than 2TB so that I could try it with the disk space I have available. When I did that, it switched to GPT as expected. The only thing I can think of that this might be is a 64-bit arithmetic problem, but I've had no luck reproducing that with unit tests of chunks of the relevant code, so I'll need the logs I asked for (syslog and partman) to get any further here.