Segno alcune operazioni da eseguire per poter grasferire il ruolo di DC da un server ad un altro in caso di disastro.
Ecco il documento di Microsoft:
Ecco invece la procedura trovata su internet:
First, you should try to recover the failed domain controller.
If that fails, you should identify the missing FSMO roles and seize them to another domain controller, if you have one
http://support.microsoft.com/kb/255504 and
http://www.petri.co.il/seizing_fsmo_roles.htm
Next, you need to remove the failed domain controller from the domain http://www.petri.co.il/delete_failed_dcs_from_ad.htm
Once this is done, you should NEVER use that computer name again as the domain will recognise it as a domain controller even though you have removed all the necessary entries