clean installation of 643.

[Yoshiki Ohshima]

  Alex,

> In the future, if you're only updating the ofw, you should just get
> to the ok prompt and type: ok flash path_to_file

  Yes, I know that, but it is not a good way to check if there is a
bug or not^^;

> Also, after the firmware is upgraded, it reboots the machine, which
> would then lead the machine into trying to do an upgrade instead of
> a clean install if you don't hold the square key. That is probably
> why it created a backup and tried to restore from it. This means
> there may be some issues with the auto-reinstallation process, which
> should be looked into.

  Yes, that explains.  Thank you!

-- Yoshiki