Topic: sme7 bdc or drbd

[tariqf]

I'm about to create an sme7 network and have a backup sme7 box  that will either act as a bdc or I'll make a cluster of the two depending on which is easier and best to implement. Before I begin please can anyone lwt me know if they have experience of the following;

(1) anyone tried drbd for the high availability as seen in this old howto for sme 5? http://no.longer.valid/phpwiki/index.php/Linux%20High%20Availability%20How-To%20for%20Mitel%20SME%20v5.1.2

(2) has anyone got a howto for setting up 2 sme7 boxes and using a domain trust and rsync to effectively create a backup domain?

(3) anyone done a pure samba bdc setup for sme7 i.e. same domain whith 2 servers authenticating clients seamlessly.

Thanks for any comments in advance.