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Home » Microsoft » Windows Server » Active Directory » Backup Restore during DCPROMO
Backup Restore during DCPROMO [message #161659] Mon, 05 October 2009 12:15 Go to next message
2010  is currently offline 2010
Messages: 36
Registered: September 2009
Member
I am adding a new 2008 R2 domain controller to our 2003 domain.

Are there certain things I can prepare for in the way of backup and restore
if there are problems during the promotion of a new domain controller?
Re: Backup Restore during DCPROMO [message #161662 is a reply to message #161659] Mon, 05 October 2009 13:10 Go to previous messageGo to next message
florian  is currently offline florian  Germany
Messages: 484
Registered: July 2009
Senior Member
Howdie!

2010 schrieb:
> I am adding a new 2008 R2 domain controller to our 2003 domain.
>
> Are there certain things I can prepare for in the way of backup and restore
> if there are problems during the promotion of a new domain controller?

Are you thinking of something specifically? There are two things that
could happen:
(1) DCpromo works correctly -> you're good.
(2) DCpromo doesn't work -> you're bad.

There's not much of backup and restore that you can do -- at least what
the soon-to-be-DC (2008D2) is concerned. If you're looking for a way to
backup your domain prior to introducing the new DC, you'd best use your
current backup solution and do a clean backup. So should you _before_
and _after_ you have updated the Schema to Server 2008 R2.

Cheers,
Florian
--
Microsoft MVP - Group Policy
eMail: prename [at] frickelsoft [dot] net.
blog: http://www.frickelsoft.net/blog.
Maillist (german): http://frickelsoft.net/cms/index.php?page=mailingliste
Re: Backup Restore during DCPROMO [message #161664 is a reply to message #161662] Mon, 05 October 2009 13:27 Go to previous messageGo to next message
2010  is currently offline 2010
Messages: 36
Registered: September 2009
Member
Yeah, i guess I am more concerned about my current domain setup in case
someting goes wrong. If something goes wrong at any point would it be
possible to just restore the active directory without restoring the whole
server. For example if there are issues after the new domain server is
introduced is there a easy way to roll back to time previous to when new DC
was introduced? I have full backups with system state, etc.

"Florian Frommherz [MVP]" wrote:

> Howdie!
>
> 2010 schrieb:
> > I am adding a new 2008 R2 domain controller to our 2003 domain.
> >
> > Are there certain things I can prepare for in the way of backup and restore
> > if there are problems during the promotion of a new domain controller?
>
> Are you thinking of something specifically? There are two things that
> could happen:
> (1) DCpromo works correctly -> you're good.
> (2) DCpromo doesn't work -> you're bad.
>
> There's not much of backup and restore that you can do -- at least what
> the soon-to-be-DC (2008D2) is concerned. If you're looking for a way to
> backup your domain prior to introducing the new DC, you'd best use your
> current backup solution and do a clean backup. So should you _before_
> and _after_ you have updated the Schema to Server 2008 R2.
>
> Cheers,
> Florian
> --
> Microsoft MVP - Group Policy
> eMail: prename [at] frickelsoft [dot] net.
> blog: http://www.frickelsoft.net/blog.
> Maillist (german): http://frickelsoft.net/cms/index.php?page=mailingliste
>
Re: Backup Restore during DCPROMO [message #161665 is a reply to message #161664] Mon, 05 October 2009 13:41 Go to previous messageGo to next message
florian  is currently offline florian  Germany
Messages: 484
Registered: July 2009
Senior Member
Howdie!

2010 schrieb:
> Yeah, i guess I am more concerned about my current domain setup in case
> someting goes wrong. If something goes wrong at any point would it be
> possible to just restore the active directory without restoring the whole
> server. For example if there are issues after the new domain server is
> introduced is there a easy way to roll back to time previous to when new DC
> was introduced? I have full backups with system state, etc.

There's nothing that could go wrong, really. What you do is simply add
another DC to the directory - the current DCs aren't changed at all.

But in case something goes wrong, you can simply unpromote the new DC
and remove it from the directory, again.

"Rolling" back the whole directory is a little more difficult -
depending on how many DCs you have. There isn't much changed during the
promotion of a new DC in the directory - there's still a metadata
cleanup you can do: http://support.microsoft.com/kb/216498

Cheers,
Florian
--
Microsoft MVP - Group Policy
eMail: prename [at] frickelsoft [dot] net.
blog: http://www.frickelsoft.net/blog.
Maillist (german): http://frickelsoft.net/cms/index.php?page=mailingliste
Re: Backup Restore during DCPROMO [message #161666 is a reply to message #161665] Mon, 05 October 2009 14:02 Go to previous messageGo to next message
2010  is currently offline 2010
Messages: 36
Registered: September 2009
Member
What do you mean by "remove it from the directory"? We currently have two
domain controllers, this will be the third. Sounds like rolling back isn't
usually necessary but would be interestd to know how it would be done. Is
the metacleanup done on all domain controllers in the domain?

I tend to make it more complicated then it usually is but i find that works
out better then making it simpler than it is.

"Florian Frommherz [MVP]" wrote:

> Howdie!
>
> 2010 schrieb:
> > Yeah, i guess I am more concerned about my current domain setup in case
> > someting goes wrong. If something goes wrong at any point would it be
> > possible to just restore the active directory without restoring the whole
> > server. For example if there are issues after the new domain server is
> > introduced is there a easy way to roll back to time previous to when new DC
> > was introduced? I have full backups with system state, etc.
>
> There's nothing that could go wrong, really. What you do is simply add
> another DC to the directory - the current DCs aren't changed at all.
>
> But in case something goes wrong, you can simply unpromote the new DC
> and remove it from the directory, again.
>
> "Rolling" back the whole directory is a little more difficult -
> depending on how many DCs you have. There isn't much changed during the
> promotion of a new DC in the directory - there's still a metadata
> cleanup you can do: http://support.microsoft.com/kb/216498
>
> Cheers,
> Florian
> --
> Microsoft MVP - Group Policy
> eMail: prename [at] frickelsoft [dot] net.
> blog: http://www.frickelsoft.net/blog.
> Maillist (german): http://frickelsoft.net/cms/index.php?page=mailingliste
>
Re: Backup Restore during DCPROMO [message #161681 is a reply to message #161659] Tue, 06 October 2009 00:07 Go to previous messageGo to next message
meiweb  is currently offline meiweb  Germany
Messages: 2225
Registered: September 2009
Senior Member
Hello 2010,

As already stated from Florian, in case something goes wrong with a new installed
DC, just remove it from the domain and cleanup AD database with ntdsutil,
if you can not demote it correct.
http://support.microsoft.com/kb/216498

Metadata cleanup you run in the domain, not on all DCs. All changes done
with ntdsutil will be replicated to all DCs.

The other DCs are not changed when adding a new DC to the domain. And as
you said make always sure to have a current AD aware backup.

So before adding a new DC it is always a good idea to use the support tools
dcdiag /v, netdiag /v and repadmin /showrepl to check for errors. Therefore
install support\tools\suptools.msi from the 2003 installation disk on the
DCs.

Also do not forget to run the adprep commands to prepare the forest and domain
and for RODCs form the 2008 installation disk on the 2003 schema master.
Depending on the OS architecture you find both, adprep32.exe(32bit) and adprep.exe(64bit)
on the 2008 R2 disk included.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
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> I am adding a new 2008 R2 domain controller to our 2003 domain.
>
> Are there certain things I can prepare for in the way of backup and
> restore if there are problems during the promotion of a new domain
> controller?
>
Re: Backup Restore during DCPROMO [message #161861 is a reply to message #161666] Thu, 08 October 2009 11:14 Go to previous message
florian  is currently offline florian  Germany
Messages: 484
Registered: July 2009
Senior Member
Howdie!

2010 schrieb:
> What do you mean by "remove it from the directory"? We currently have two
> domain controllers, this will be the third. Sounds like rolling back isn't
> usually necessary but would be interestd to know how it would be done. Is
> the metacleanup done on all domain controllers in the domain?

Yeah, I meant the meta data cleanup here. You do it on one DC and things
replicate out among all DCs. The cleanup on one DC is sufficient.

> I tend to make it more complicated then it usually is but i find that works
> out better then making it simpler than it is.

Yeah, that is a good approach. It better to be safe than sorry, I agree. :)

Florian
--
Microsoft MVP - Group Policy
eMail: prename [at] frickelsoft [dot] net.
blog: http://www.frickelsoft.net/blog.
Maillist (german): http://frickelsoft.net/cms/index.php?page=mailingliste
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