The Primary Domain Controller has lost all zone entries. Can I replicate the zones from the Backup Domain Controller or do I need to promote the BDC to PDC?
Monday, January 21, 2013 10:39 PMJust as the title says-The Primary Domain Controller has lost all zone entries. Can I replicate the zones from the Backup Domain Controller or do I need to promote the BDC to PDC, wait for replication to take place, then reverse the roles again?
Monday, January 21, 2013 11:00 PM
Unless you are still running Windows NT, there is no such thing as a PDC or BDC. Replication between the DNS servers should be automatic. Does your second DC still have the zones?
Monday, January 21, 2013 11:04 PMYes, I know that but to me there isn't much difference between that and saying primary or secondary. Anywho, yes the second DC still has all of it's zones and records. I'm not sure why the other lost the infomation as I don't see anything wrong and it doesn't appear to have rebooted.
- Edited by WayneAshby Monday, January 21, 2013 11:41 PM
Monday, January 21, 2013 11:12 PM
I think I found the answer but just want to make sure. Should I go into AD, right-click root node, select Operations Master, select PDC, and switch roles?
- Edited by WayneAshby Monday, January 21, 2013 11:40 PM
Tuesday, January 22, 2013 1:47 AM
On my side Iam wondering why the zone is not the same on both side. If an admin erased all data, the zone should replicate the error to the other DC.
Any AD error in your eventlog ?
For the role holder Iam not sure it will do like you want, I would simply close the problematic's DC to prevent it to replicate. Last writer win for DNS record I think.
"Because Active Directory service uses the multimaster replication model, DNS updates can be written to any Active Directory-integrated DNS server, and the data will automatically be replicated across all the domain controllers. " - http://technet.microsoft.com/en-us/library/cc786438(v=ws.10).aspx
Tuesday, January 22, 2013 2:24 AM
I second Yagmoth on the fact that if both DC's have AD integrated zones then erasing one would erase the other when the DNS replicated. Unless, of course replication is broken because without the local domain zones, replication could not contact the other DC to replicate. Another reason might be that the second DC has only a secondary or stub zone, not AD integrated.
For now, i would export the zone out of the good server as a backup and then restore from backup. Do you have a bare metal backup, system state backup? If yes, you can restore the AD integrated zones from there.
- Edited by Miguel FraMicrosoft Community Contributor Tuesday, January 22, 2013 2:25 AM
Wednesday, January 23, 2013 4:09 PMThe issues resolved itself which leaves me with an uneasy feeling. No one erased anything so maybe the secondary pushed what it had to the primary? Anyhow, thanks for the replies.
- Marked As Answer by WayneAshby Wednesday, January 23, 2013 4:09 PM