After you install SP1 on Windows Server 2003 on a domain controller, NTBACKUP.exe fails, with a report similar to:
Backup Status Operation: Backup Active backup destination: File Media name: "xxxxxxx created MM/DD/YYYY at HH:MM" Volume shadow copy creation: Attempt 1. "NTDS" has reported an error 0x800423f0. This is part of System State. The backup cannot continue.This behavior will occur if you have relocated your Active Directory database and/or log files to another volume, and no file on that volume is backed up.
To workaround this behavior, create a small text file, like forceVS.txt, on the volume where the Active Directory database and/or log files reside, and insure that NTBackup.exe selects this file on every backup.
NOTE: To insure that your incremental or differential backup always selects the forceVS.txt file, schedule a job each day, earlier than the backup, that alters the file. It can be as simple as @echo %DATE% %TIME%>D:\forceVS.txt, if the file resides on D:.