[Samba] after a couple of year of success is not possible to add workstations to domain

Massimo Donato - Adcom.it donato at adcom.it
Tue Feb 6 16:08:24 UTC 2018

Il 05/02/2018 16:41, Rowland Penny ha scritto:
> On Mon, 5 Feb 2018 16:01:27 +0100
> "Massimo Donato - Adcom.it via samba" <samba at lists.samba.org> wrote:
>> */Hi all,
>>      after a couple of year of successfully working samba AD DC is
>> not possible to add workstations to domain
>> since a few day ago in windows i get a messagge complaining that the
>> account previously exists. ant that to try access with a different
>> account. after some investigation i found that the backupDC  was in
>> hardware fault. the primary seems to work great, but still unable to
>> add workstation to domain.
>> seems like something is missing,
>> samba version is 4.7.4(upgraded during investigation)
>> any advice ? where to look ?
> One of the problems here is that you are thinking in terms of 'primary'
> and 'backup' DCs. You haven't got a 'primary' DC or a 'backup' DC, you
> just have two DCs and they should both contain exactly the same data in
> AD. Problem is, when your second DC became faulty, it may have
> corrupted AD on the DC and then replicated this corruption to the
> first DC.
> I would turn off the faulty DC (if it is still running), demote the
> dead DC and then run 'samba-tool dbcheck'
> But, before I tried to do anything, I would ensure that the first DC
> was fully backed up.
> Rowland
thank you Rowland for your answer.,
i understend what you mean regarding DC, there was just two dc.
the faulty DC is no more in our datacenter(disk dead)
so i have one DC that is corrupted, i have a backup, but only after 
dbcheck is good, even with ncs option, 0 errors
any other advice to check ?

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