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. . . . . . . . . . . . . . . . . . . . . . . . . . Data Backup Techniques .and.Procedures

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6. From the Restore Files to drop-down list box, select the Original

Location option.

7. Click the Start Restore button to begin the restore operation.

8. Click OK for the Warning message box that appears, informing you

that "Restoring the System State will always overwrite current System

State unless restoring to an alternate location."

9. Next, the Confirm Restore message box appears. Click OK to begin

the restore operation, or click Advanced to specify Advanced Restore

Options and then begin the restore.

10. The Restore Progress window keeps you updated on the progress of

the restore job and it will notify you when the restore is finished. Click

the Report button to view the Restore Report log.

11. Click the Close button to finish the System State restore process.

12. For a System State restore, you might be prompted to restart the com-

puter. Click Yes to restart the computer immediately, or click No and

you can restart it later.

Restoring the System State for DCs

Windows Server 2003 computers that act as DCs store Active Directory data

within the SYSVOL folder and within the Active Directory database (ntds.dit)

file. The objects contained within the SYSVOL folder and the Active Directory

database are always open and being accessed by the directory service. The

shadow copy service cannot help with this condition for Active Directory

files because the data is always in a state of flux due to replication of the data

between DCs. Therefore, you must reboot a DC and select Directory

Services Restore Mode from the Windows Advanced Options startup menu

(see Figure 9.18) to perform a restore of its System State and the DC's Active

Directory database. You still use the Windows Server 2003 Backup Utility to

perform the System State restore, but the restore operation must occur while

the computer is in Directory Services Restore Mode.

Because Active Directory uses multimaster replication to synchronize all the

DC databases throughout an Active Directory domain, performing a normal

restore is not sufficient when objects such as user accounts, groups, or orga-

nizational units get accidentally deleted or incorrectly modified. All objects

in Active Directory are assigned Update Sequence Numbers (USNs) that

determine which objects are the most up to date when replication occurs

between DCs. After you perform a normal, or nonauthoritative, restore, the

restored objects retain their previous USNs; objects that had been deleted