Need urgent help with samba4 DC re-join

Andreas Oster aoster at
Fri Jul 13 00:09:51 MDT 2012

Am 03.07.2012 00:32, schrieb Andrew Bartlett:
> On Mon, 2012-07-02 at 20:00 +0200, Andreas Oster wrote:
>> Hello Andrew,
>> as I have written, I have managed to restore the system to the state
>> before my disastrous attempt to demote my BDC (novadc02). Currently both
>> servers operate normal but still the problems with objectClass and
>> objectCategory of the DomainDnsZones and ForestDnsZones exists.
>> Would it make sense to, after taking a proper backup, demote the second
>> DC again or should the faulty DB entries be fixed first ?
> I've been thinking over this, and the reason for the slow replies is
> that the situation isn't easy to fix.  Somehow (and I would like to
> understand how), the instanceType in your DNS partition on the master is
> set not to include the WRITE bit.  This causes the repl_meta_data
> message you see.
> However, I'm pretty sure 'fixing' the instanceType bit would be
> prohibited by the objectclass module, enforcing the broken schema.  
> Given all that, it seems the 'safe' way to fix it is to correct the
> instanceType based on the msDS-hasMasterNCs attribute in a dbcheck
> routine, setting various flags to bypass checking for this specific
> change, but I've not written that yet. 
> Sorry,
> Andrew Bartlett
Hello Andrew,

did you have a chance to do something regarding the dbcheck enhancement
to fix the broken schema of my samba4 installation ?

Thank you for your kind help

best regards


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