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Problem restoring AD from tape

By Steve@pw ·
I have 2 DCs. These act as file & print servers and these services are clustered as they carry the user's home folders on a SAN. One DC (the active part of the cluster and the PDC at the time) suffered a hardware failure requiring new PSU, motherboard & raid controller to get it working. The cluster flipped over OK and no one
even noticed except me.
The server is now repaired and W2K Advanced Server reinstalled. When I restore (using AD recovery mode) from either Veritas or NTBackup files I get errors similar to this -
Veritas: Connection to the restore target has been lost. Operation aborted.
^ ^ ^ ^ ^ Access denied to file \Registry\default. ^ ^ ^ ^ ^ Error writing file data. ^ ^
^ ^ ^ Access denied to file \Registry\SAM. ^ ^ ^ ^ ^ Error writing file data. ^ ^ ^ ^ ^
Access denied to file \Registry\SECURITY
NTBackup: Unable to restore "File Attributes Security" for file default
Unable to restore "File Attributes Security" for file SAM
Unable to restore "File Attributes Security" for file SECURITY
Unable to restore "File Attributes
Rebooting causes a BSOD with a STOP 0x00000050. Will boot into safe mode.
This occurs at the end of the restore when most of thr data is restored.
The Veritas site says: 'These errors usually occur during a complete disaster recovery. Because the Active Directory database was installed on one partition and the Active
Directory log files were installed to a different
partition, the system was not rebuilt in the same fashion. In order to restore Active Directory, the partitions need to be recreated identically to their original layout.'

However, there are only the same two HDs, raided as before the backup, no new partitions. Anyone have any ideas?

Once I get the backup restored (non-authoritative) presumably the system will just update the AD from the active DC and also rejoin the cluster? It's been down about 12 days now.

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by vahur In reply to Problem restoring AD from ...

Hi,
You shouldn't restore the active directory from tape backup. Instead run dcpromo on the repaired server and it will get all the ad info from the working ad server. If the repaired server was holding the FSMO roles prior to the failure, you also have to seize the fsmo roles on the currently working server. Search MS KB for the applicable article.

All the best,
vahur

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by Steve@pw In reply to

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by Steve@pw In reply to Problem restoring AD from ...

It turns out that the engineer who repaired the server used an earlier version of the drivers for the ServeRaid card than those the backup was made with and for some reason W2K saw this as a different partition.

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by Steve@pw In reply to Problem restoring AD from ...

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