[Samba] Best way to upgrade domain from control by 2.2.5 PDC to control by 3.0.20b PDC

[Kevin]

Thank you very much, John, for your reply.  You're right... I was
reading the wrong book for insights into my upgrade plan.  Thanks for
pointing me to the right book.

>>>>> My other questions are:
>>>>> a) Any problems with a samba-3.x BDC backing up a samba 2.2.5 PDC?

>>>> samba 2.x.x doesn't support BDC

>>> I thought that 2.2.x introduced some BDC functionality.  No?

>> No - apparently saying it once isn't enough though.

> Samba-2.2.x CAN be used as a BDC, but it was not officially supported.
> It is officially supported in Samba-3.0.x.

My question about BDC was not whether 2.2.x could be used as a BDC, but
rather, if I should expect any problems in using 3.x as a BDC for a
2.2.5 PDC (which I'm still unsure of, but I'll drop it in hopes of
finding an answer in the Samba-3 by Example book).  Perhaps I could have
written that more clearly in the first instance.  Apologies for creating
the confusion there.

-Kevin