Domain Controllers are out of sync, struggling to get them to resync.

[Llirrom]

Hi all,

 

We have two Active Directory Domain Controllers running on separate hypervisor servers on-site. AD16-01 is the operations master and AD16-02 is the backup. These both run on Windows Server 2016.

 

AD16-01 rebooted without cleanly shutting down on Sunday evening at 22:04:22, I believe that this is what has caused the sync to break.

 

When I run "repadmin -showrepl" this is the issue we are getting:

 

I have attempted to manually resync AD16-01 and AD16-02 using "repadmin /syncall /A /e /P" but I am still getting the same issue that a disk operation failed even after retries.

 

I have also used w32tm /resync in order to resync the time as I know this can also cause issues when syncing.

 

I am very new to AD, especially syncing issues. Any advice would be greatly appreciated as I worry the longer this doesn't sync, the more data that could be lost if I have to revert AD16-01 to a previous backup whilst its the operations master.

 

Thanks!

[HC_Netman]

https://learn.microsoft.com/en-us/troubleshoot/windows-server/active-directory/replication-error-1127

 

Does this help you at all?