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NT4.0 Backup

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by ronschmidt

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I am trying to use the AT command on a backup domain controller server to back up a disk drive on the primary domain controller using the ntbackup utility. When batch file containing the ntbackup utility and parameters is launched via an AT command on the backup domain controller server it give an error message stating "you do not have permission to access portions of xxxxxx" where xxxxxx is the resource residing on the primary doamin controller I am trying to backup. I can double click on the batch file containing the ntbackup command and parameters and the backup works fine but the auto backup using the AT command fails. I am logged onto the backup domain controller server as the administrator. Why can't the AT command launch the ntbackup batch file and accomplish the backup
like it does when I double click the batch file
myself - which works fine?

Thank you very much.

Ron Schmidt
ronschmidt@trimfoot.com

5 replies

by sgt_shultz

see if this is you:
from support.microsoft.com Q142671

Backup Fails on Certain Directories Due to Lack of Permissions

SYMPTOMS
After you log on with an account that has Backup Operator permissions, when you run a backup across the network from a Windows NT 4.0 computer you may receive the following error in the backup.log file stating you do not have permissions to back up some directories:

You do not have permission to access portions of data. Please see the owner or administrator to get permission. Directory F:\data
CAUSE
An account with Backup Operator permission should have the built-in ability to back up files that it does not have permissions to access. However, this ability does not work properly in Windows NT 4.0.

RESOLUTION
Microsoft has updated RDR.SYS to open remote files in the correct context.

This update is available from Microsoft support channels or directly from the following Internet location:

ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/usa /nt40/hotfixes-postSP1/NTBackup-fix

STATUS
Microsoft has confirmed this to be a problem in Windows NT version 4.0. This problem was corrected in the latest Microsoft Windows NT 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

MORE INFORMATION
The built-in ability of the backup operator works properly locally.

by shawn

Check to make sure that the user the scheduled process is running as is part fo the Backup Operators group.

The other thing is, as far as I know, ntbackup.exe would only work with tape drives, it wouldn't let you backup to a file. Only the built-in backup with Windows 2000 started offerring this functionality.

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