Re: Authoritative restore

Tech-Archive recommends: Fix windows errors by optimizing your registry

From: Jérôme Moinard (JrmeMoinard_at_discussions.microsoft.com)
Date: 08/05/04 

Date: Thu, 5 Aug 2004 01:25:01 -0700

Yes you can demote it and promote it, but before that, you should transfer any FSMO roles owned by this server to the other.
If Server B is the second DC you installed and if you have made no change, it should not own roles. 

-- 
Jérôme Moinard
"ptwilliams" wrote:
> Is demoting and promoting that big a deal??  Without a backup I wouldn't
> hesitate to do just that...
> 
> 
> -- 
> 
> Paul Williams
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> 
> "Joe" <anonymous@discussions.microsoft.com> wrote in message
> news:c31001c47a3a$4c0a93f0$a301280a@phx.gbl...
> Thanks a lot...
> 
> Just one more question.
> 
> Unfortunatly (my mistake, i know) i have no system state
> neither AD backup. So, i guess what i have to do is the
> non-authoritave restore/process (on Server "B") skiping
> the restoring step, right? I hope this help, otherwise, i
> think my last option is demote and promote Server "B".
> 
> >-----Original Message-----
> >Hi,
> >
> >In your case, you must do a NON authoritative restore on
> your server B with a backup of server B. You boot in AD
> restore mode and restore system state of server B then you
> reboot normally the server.
> >When it will come online, it will replicate data from
> your server A.
> >
> >What is an authoritative restore?
> >
> >You have to do an authoritative restore when you have
> deleted something in AD that you should not and the DC on
> which you delete rthe object has replicated with other DC.
> Now the deleted object is referenced in AD as deleted.
> >Each object in AD has a USN which is the version of the
> object.
> >
> >To restore your deleted object you boot in AD restore
> mode, you restore system state. Your deleted object is now
> restored but its USN is smaller than the USN of the
> deleted object that is curently in AD. So when you reboot
> your dc, it replicates with other, the USN of the deleted
> object is greater than the restored object so it deletes
> it.
> >
> >In order to make the USN of the restored object greater
> than the deleted object, you use authoritative restore but
> only on your deleted object. It will add 100 000 to the
> USN of the restored object. So when replcate, it will be
> kept.
> >
> >-- 
> >Jérôme Moinard
> >
> >
> >"Joe" wrote:
> >
> >> Am i right with this?
> >>
> >> I have 2 DCs currently online (say Server "A" and
> >> Server "B"), one of them is having problems replicating
> >> and has its AD database corrupted. So...i'm planning an
> >> authoritative restore from Server A to Server B (again,
> >> Server "B" has its AD corrupted). These are the steps
> for
> >> an authoritive restore?
> >>
> >> 1.Run NTDSUTIL from Server "A"
> >> 2.type authoritative restore
> >> 3.type restore database
> >>
> >> OR
> >>
> >> 1.Reboot Server "A" and enter in Service Rest. Mode
> >> 2.Run NTDSUTIL from Server "A"
> >> 3.type authoritative restore
> >> 4.type restore database
> >> 5.Quit and restart
> >>
> >>
> >>
> >.
> >
> 
> 
>

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