[Last Call] Learn how to a build a cloud-first strategyRegister Now

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 115
  • Last Modified:

USN Rollback

2 domain controllers (2008 R2) were not properly recovered from images as images were taken/recovered in 20 min difference.
repadmin /showutdvec * dc=domain,dc=com does not show any problem.
USN shown on each DC for its partner is the same or higher then partners one for itself.
No errors on both DCs in Directory Service log.

My worry is   "Undetected USN Rollback" which results in undetected divergence where USNs  f.e.  2000 through 2100 are not the same between two domain controllers.

Is any way to determine that?
Thank you.
0
D_Batona
Asked:
D_Batona
  • 4
1 Solution
 
Seth SimmonsSr. Systems AdministratorCommented:
why did you restore from images to begin with?
not a good idea to do server images of domain controllers for this reason

have you looked at this article?

How to detect and recover from a USN rollback in Windows Server 2003, Windows Server 2008, and Windows Server 2008 R2
https://support.microsoft.com/kb/875495
0
 
D_BatonaAuthor Commented:
1. I did not
2. It is a good idea when you know how.
3 . I read that article and many others.

What about answering a question?
0
 
D_BatonaAuthor Commented:
4 days.

So far no errors in logs on both DCs.
repadmin /showutdvec  shows a good picture.

Can admin stop praying?


What else can be used to check that correspondence object-USN are the same on both controllers?
Is any active directory expert here?
0
 
D_BatonaAuthor Commented:
Look like no experts on this web site anymore...

For those who are interested here what I did to check if USN issue exist:

1. I applied the image of DC1 to server with identical hardware disconnected from network.
2. I run repadmin /showutdvec * dc=domain,dc=com and make a notice
3. I applied the image of DC2 to server with identical hardware disconnected from network.
4. I run repadmin /showutdvec * dc=domain,dc=com and make a notice
5. Analyzing repadmin /showutdvec showed that domain controllers did not replicate after images were taken

I sent sysadmin to learn something but I doubt it will help..........
0
 
D_BatonaAuthor Commented:
No one suggested a better way
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

  • 4
Tackle projects and never again get stuck behind a technical roadblock.
Join Now