active directory

on one of my windows 2012 server

 I am getting below error

 NTDS (648) NTDSA: A bad page link (error -327) has been detected in a B-Tree (ObjectId: 174, PgnoRoot: 655) of database D:\windows\NTDS\ntds.dit (407594 => 22348, 359484).

 EVENT ID:447

I had got answer from bas 2754 ,

Follow the directions on that page and it is your best bet to try to recover if you do not have a backup.  If you have more than one domain controller you may be able to remove this controller from the domain and add it back.  If it is the only controller then a restore or rebuild are your only options.

which solution I accepted, but I have to reopen because I have one question:

do I need to do before demoting and repromoting server.

1)      Remove antivirus from the server
2)      Perform an offline defrag of ntds.dit if not done already

we have couple of other DNS servers , should we do during office time

HOW LONG CAN I CONTINUE WITH THIS ERROR

is it required
pramod1Asked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Kash2nd Line EngineerCommented:
how many DCs you have in your network.

if you have more than 1 then it should be an easy tasks. Demote it and promote it again.

If not then I would suggest a full backup of the server first and then defrag the ntds.dit file.
Make sure you check the backup that it contains ntds.dit file as you will be in the world of pain if it isn't.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
pramod1Author Commented:
so it is better to defrag and the demote it.

I have on equestion related to one DC , we receive everyday SCOM alert that one dc is down, it is hardware failure

it keeps coming up in AD report

how can we remove from system, do we need to fire up the DC again to remove from AD sites and services or there is any other method to wipe off
pramod1Author Commented:
we have more than 1 DC , so frag is still required? can we do in office time
Kash2nd Line EngineerCommented:
if you have more than one DC then make sure all FSMO to the one that is working fine and then demote the other DC.
then promote it back and it should be fine.
pramod1Author Commented:
sir

you are answering in short.

have one question related to one DC , we receive everyday SCOM alert that one dc is down, it is hardware failure

 it keeps coming up in AD report

 how can we remove from system, do we need to fire up the DC again to remove from AD sites and services or there is any other method to wipe off
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Active Directory

From novice to tech pro — start learning today.