When a volume containing a DFSR replicated folder experiences a USN Journal Wrap or Journal Loss, what exactly occurs during the recovery procedure? I'm interested to know if that replication member then performs a checksum for all files against a known-good replica on another server. Or does that node only need to perform checksum between it's file and the local DFSR database?

Please check if following article and thread can help explain the question: Troubleshooting journal_wrap errors on Sysvol and DFS replica sets http://support.microsoft.com/kb/292438 DFS Replication has experienced an update sequence number (USN) journal loss on D: http://social.technet.microsoft.com/Forums/en-US/winserverfiles/thread/7eccb1fc-511b-4787-94fb-de261d06612bShaon Shan |TechNet Subscriber Support in forum |If you have any feedback on our support, please contact tngfb@microsoft.com

Please check if following article and thread can help explain the question: Troubleshooting journal_wrap errors on Sysvol and DFS replica sets http://support.microsoft.com/kb/292438 DFS Replication has experienced an update sequence number (USN) journal loss on D: http://social.technet.microsoft.com/Forums/en-US/winserverfiles/thread/7eccb1fc-511b-4787-94fb-de261d06612b Shaon Shan |TechNet Subscriber Support in forum |If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

How are things going? If there is anything further we can help please just let us know.Shaon Shan |TechNet Subscriber Support in forum |If you have any feedback on our support, please contact tngfb@microsoft.com