[jggimi]

To answer one very specific question:

Originally Posted by Funkygoby

When does OpenBSD fdisk proceed? I though that any writing on disk wouldn't occur until I say so?

In command mode, "quit" will write your changes. You must use "exit". Excerpted from fdisk(8).

     exit    Exit the current level of fdisk, either returning to the
             previously selected in-memory copy of a MBR, or exiting the
             program if there is none.

     quit    Exit the current level of fdisk, either returning to the
             previously selected in-memory copy of a MBR, or exiting the
             program if there is none.  Unlike exit it does write the modified
             block out.