Exchange 2007\2010 Database Replication issues – Re-seed

Database replication problems can be caused by many things

• Hardware Failure
• Network Outage
• Administrative Change
• Log Corruption

Ifyou have replication issues this WILL cause problems in moving the overthe active node of your cluster, that is one reason it is veryimportant you do not use cluster administrator to perform the move butrather use either EMC or EMS.

EMS Process = Move-ClusteredMailboxServer -id ClusterName -TargetMachine Node2 (2007)
                      Move-ActiveMailboxDatabase “Mailbox Database” -ActivateOnServer Node2 (2010)
EMC Process =
Server Configuration -> Mailbox -> Right Click ServerName -> Manage Clustered Mail Box Server -> browse for server -> next -> move (2007)
Organization Configuration -> Mailbox -> Database management -> Rt Click Database -> Move Active mailbox Database -> browse for server -> ok -> move (2010)

Ifyou suspect you have a replication issue or you did but have nowresolve the problem and are ready to “Re-Seed” your databases here isthe process

EMS Process = Open Exchange management Shell ON the PASSIVE NODE

1. First verify that the database is not replicating correctly
   “get-storagegroupcopystatus or (Get-MailboxDatabaseCopyStatus for 2010)”
   If the state is other than healthy or the numbers for the queues are increasing then you have a replication issue.
   CopyQueue length (Logs queuing up to be sent to the passive node)
   ReplayQueue length (Logs queuing up to be replayed to the passive node database)
    
2. To re-seed a database (remove all the passive contents and re-copy)
   • On the PASIVE node first suspend the Storage group in question
     “Suspend-StorageGroupCopy -id clustername\storagegroup” (2007)
     “Suspend-MailboxDatabaseCopy -id mailboxname\servername” (2010)
     then force an update removing the old data on the passive.
     “Update-storagegroucopy -id clustername\storagegroup -DeleteExistingFiles” (2007)
     “Update-MailboxDatabasecopy -id mailboxname\servername -DeleteExistingFiles” (2010)
     Or if you just want to reseed the entire Server (2007)
     • Get-StorageGroup -Server clustername | suspend-StorageGroupCopy
     • Get-StorageGroup -Server clustername| Update-StorageGroupCopy -DeleteExistingFiles

EMC Process = Open Exchange Management Console on the PASSIVE NODE

1. Server Configuration -> Mailbox -> Select Cluster- > rt click Storage Group -> Suspend Storage group Copy (2007)
   Organization Configuration -> Mailbox -> Database management -> Rt Click Database copy -> suspend database copy (2010)
2. Server Configuration -> Mailbox -> Select Cluster- > rt click Storage Group -> update storage group copy -> -> check “Delete Existing”->  Next -> Update (2007)

Organization Configuration -> Mailbox -> Database management -> Rt Click Database copy -> update Database copy -> update (2010)