On our Exchange 2010 DR test, we lost all the nodes in the cluster. Below the clear up steps which we remove the old setting and re-add the nodes, database back to DAG:
| Get DAG info | Get-DAG shows node 1/3 are stopped node and node 2 is started but missing node4 |
| Remove DAG | Remove-DatabaseAvailabilityGroupServer -Identity DAG01 -ConfigurationOnly:$TRUE -MailboxServer MBP01 WARNING: The operation wasn't successful because an error was encountered. You may find more details in log file "C:\ExchangeSetupLogs\DagTasks\dagtask_2010-11-15_14-15-28.839_remove-databaseavailabiltygroupserver.log". Mailbox server 'MBP01' cannot be removed from the database availability group because mailbox database 'DB01' has multiple copies. Use Remove-MailboxDatabaseCopy either to remove the copy from this server or to remove the copies from other servers in the database availability group. + CategoryInfo : InvalidArgument: (:) [Remove-DatabaseAvailabilityGroupServer], RemoveDagServer...icatedE xception + FullyQualifiedErrorId : C26FF955,Microsoft.Exchange.Management.SystemConfigurationTasks.RemoveDatabaseAvailabili tyGroupServer [PS] C:\Windows\system32>Get-MailboxDatabaseCopyStatus *\MBP01 Name Status CopyQueue ReplayQueue LastInspectedLogTime ContentIndex Length Length State ---- ------ --------- ----------- -------------------- ------------ DB01\MBP01 Dismounted 0 0 Failed DB02\MBP01 Failed 0 0 11/12/2010 11:50:57 AM Failed DB03\MBP01 Failed 0 0 11/12/2010 11:47:36 AM Failed DB07\MBP01 Failed 0 0 11/12/2010 11:47:23 AM Failed |
| Remove DB | Get-MailboxDatabaseCopyStatus *\MBP01 Name Status CopyQueue ReplayQueue LastInspectedLogTime ContentIndex Length Length State ---- ------ --------- ----------- -------------------- ------------ DB01\MBP01 Dismounted 0 0 Failed DB02\MBP01 Failed 0 0 11/12/2010 11:50:57 AM Failed DB03\MBP01 Failed 0 0 11/12/2010 11:47:36 AM Failed DB07\MBP01 Failed 0 0 11/12/2010 11:47:23 AM Failed Get-MailboxDatabaseCopyStatus *\MBP01 | Remove-MailboxDatabaseCopy Get-MailboxDatabaseCopyStatus *\MBP03 | Remove-MailboxDatabaseCopy Get-MailboxDatabaseCopyStatus *\MBP04 | Remove-MailboxDatabaseCopy Get-MailboxDatabaseCopyStatus *\MBP02 | Remove-MailboxDatabaseCopy Example log: The database "DB01" is currently hosted on server "MBP01". Use Move-ActiveMailboxDatabase to move the active copy of the database to a different server. You can use the Remove-MailboxDatabase task if this is the only copy.Confirm |
| Remove Server | Remove-DatabaseAvailabilityGroupServer -Identity DAG01 -ConfigurationOnly:$TRUE -MailboxServer MBP01 Remove-DatabaseAvailabilityGroupServer -Identity DAG01 -ConfigurationOnly:$TRUE -MailboxServer MBP02 Remove-DatabaseAvailabilityGroupServer -Identity DAG01 -ConfigurationOnly:$TRUE -MailboxServer MBP03 Remove-DatabaseAvailabilityGroupServer -Identity DAG01 -ConfigurationOnly:$TRUE -MailboxServer MBP04 Confirm Are you sure you want to perform this action? Removing Mailbox server "MBP01" from database availability group "DAG01". [Y] Yes [A] Yes to All [N] No [L] No to All [?] Help (default is "Y"): a |
| Clear up cluster | On each nodes: cluster node /force Attempting to clean up node '' ... Clean up successfully completed. |
| Disable DAG computer account | In AD computer OU: · Disable tag01 computer object · Assign “Exchange trusted subsystem” full control to the object:  |
| Remove failover cluster role | On each node: servermanagercmd -r failover-clustering Servermanagercmd.exe is deprecated, and is not guaranteed to be supported in fut ure releases of Windows. We recommend that you use the Windows PowerShell cmdlets that are available for Server Manager. Start Removal... [Removal] Succeeded: [Failover Clustering] Failover Clustering. Success: Removal succeeded. |
| Add servers back to DAG | Add-DatabaseAvailabilityGroupServer -Identity DAG01 -MailboxServer MBP01 Add-DatabaseAvailabilityGroupServer -Identity DAG01 -MailboxServer MBP02 Add-DatabaseAvailabilityGroupServer -Identity DAG01 -MailboxServer MBP03 Add-DatabaseAvailabilityGroupServer -Identity DAG01 -MailboxServer MBP04 |
| Test Cluster | Move cluster resource group to each nodes: cluster group "cluster group" /moveto:mbp02 Group Node Status -------------------- --------------- ------ cluster group MBP02 Online |
| Get info | Get-MailboxDatabaseCopyStatus * Name Status CopyQueue ReplayQueue LastInspectedLogTime ContentIndex Length Length State ---- ------ --------- ----------- -------------------- ------------ DB03\MBP02 Mounted 0 0 Healthy DB04\MBP02 Dismounted 0 0 Failed DB07\MBP04 Mounted 0 0 Healthy DB08\MBP04 Dismounted 0 0 Failed DB02\MBP04 Dismounted 0 0 Failed DB06\MBP04 Dismounted 0 0 Failed DB05\MBP03 Mounted 0 0 Healthy DB01\MBP01 Dismounted 0 0 Failed DR_DB08\UMP01 Mounted 0 0 Healthy drdb01\UMP01 Mounted 0 0 Healthy Mailbox Database 1150652460\UMP01 Dismounted 0 0 Failed dr_db02\UMP01 Mounted 0 0 Healthy dr_db03\UMP01 Mounted 0 0 Healthy dr_db04\UMP01 Mounted 0 0 Healthy DR_DB07\UMP01 Mounted 0 0 Healthy dr_db05\UMP01 Mounted 0 0 Healthy DR_DB06\UMP01 Mounted 0 0 Healthy |
| Remove old database | · Clean up all move request Get-MoveRequest | Remove-MoveRequest · Move users to DR databae Get-MailboxDatabase | Mount-Database Get-Mailbox -Database DB08 | New-MoveRequest -TargetDatabase dr_db08 Get-MoveRequestStatistics Get-MoveRequest | Remove-MoveRequest · Mount public folder database : Get-PublicFolderDatabase | Mount-Database · Format all the database drives on each node |
| Create DB | Create the “Logs” folder in the each database folder and run commands: new-mailboxdatabase -Server 'MBP01' -Name 'DB02' -EdbFilePath 'D:\MPS\DB02\DB02.EDB' -LogFolderPath 'D:\MPS\DB02\LOGS' new-mailboxdatabase -Server 'MBP02' -Name 'DB03' -EdbFilePath 'D:\MPS\DB03\DB03.EDB' -LogFolderPath 'D:\MPS\DB03\LOGS' new-mailboxdatabase -Server 'MBP02' -Name 'DB04' -EdbFilePath 'D:\MPS\DB04\DB04.EDB' -LogFolderPath 'D:\MPS\DB04\LOGS' new-mailboxdatabase -Server 'MBP03' -Name 'DB05' -EdbFilePath 'D:\MPS\DB05\DB05.EDB' -LogFolderPath 'D:\MPS\DB05\LOGS' new-mailboxdatabase -Server 'MBP03' -Name 'DB06' -EdbFilePath 'D:\MPS\DB06\DB06.EDB' -LogFolderPath 'D:\MPS\DB06\LOGS' new-mailboxdatabase -Server 'MBP04' -Name 'DB07' -EdbFilePath 'D:\MPS\DB07\DB07.EDB' -LogFolderPath 'D:\MPS\DB07\LOGS' new-mailboxdatabase -Server 'MBP04' -Name 'DB08' -EdbFilePath 'D:\MPS\DB08\DB08.EDB' -LogFolderPath 'D:\MPS\DB07\LOGS' |
| Mount DB | Get-MailboxDatabase | Mount-Database -Force |
| Add DB copy | Add-MailboxDatabaseCopy DB01 -MailboxServer mbp02 Add-MailboxDatabaseCopy DB02 -MailboxServer mbp04 Add-MailboxDatabaseCopy DB03 -MailboxServer mbp01 Add-MailboxDatabaseCopy DB04 -MailboxServer mbp03 Add-MailboxDatabaseCopy DB05 -MailboxServer mbp02 Add-MailboxDatabaseCopy DB07 -MailboxServer mbp01 -DomainController dc04 |
| Troubleshooting | Get-MailboxDatabaseCopyStatus * | where{ $_.status -like "fail*"} |Suspend-MailboxDatabaseCopy Get-MailboxDatabaseCopyStatus * | Suspend-MailboxDatabaseCopy Get-MailboxDatabaseCopyStatus * | Update-MailboxDatabaseCopy –DeleteExistingFiles |
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