Restoring a Domain Controller Through Reinstallation and Subsequent Restore from Backup
Applies To: Windows Server 2008, Windows Server 2008 R2
If you cannot restart a domain controller in Directory Services Restore Mode (DSRM), you can restore it through reinstallation of the operating system and subsequent restore of Active Directory Domain Services (AD DS) from backup.
After you reinstall Windows Server 2008, perform a nonauthoritative restore of a system state or critical-volumes backup. You must have a previous backup for the failed domain controller, and the backup cannot be older than the tombstone lifetime for the forest.
You do not have to join the computer to the domain before you perform the restore procedure. During the restore, the computer account is reestablished automatically.
You must perform the restore procedure by using the same backup tool with which the backup was made. Procedures in this task describe using Windows Server Backup to restore AD DS, but you must use the tool that you used to create the backup file if it is not Windows Server Backup.
To perform the domain controller restore procedure, you must have the following information about the failed domain controller:
Disk configuration. You need a record of the volumes and sizes of the disks and partitions. In the case of a complete disk failure, use this information to recreate the disk configuration. Windows Server 2008 must be reinstalled to the same drive letter and with at least the same amount of physical drive space as for the original installation. Before you restore the system state, you must recreate all disk configurations. Failure to recreate all disk configurations can cause the restore process to fail, and it can prevent you from starting the domain controller after the restore.
Computer name. You need the computer name to restore a domain controller of the same name and avoid changing client configuration settings.
DSRM Administrator password. You must know the DSRM Administrator password that was in use when the backup was created.
The following tools are required to perform the procedures for this task:
Remote Desktop Connection (optional)
To complete this task, perform the following procedures:
- After you configure the disks appropriately, install Windows Server 2008.
This guide does not provide information about installing Windows Server 2008. For information about installing Windows Server 2008, see Installing Windows Server 2008 (http://go.microsoft.com/fwlink/?LinkID=111104).
- Restart the server in DSRM by using one of the following methods:
Restarting a member server in DSRM is not possible in Windows Server 2003, but it is possible in Windows Server 2008.
[Restart the Domain Controller in Directory Services Restore Mode Locally](cc816897\(v=ws.10\).md) Or [Restart the Domain Controller in Directory Services Restore Mode Remotely](cc794729\(v=ws.10\).md)