NTBackup may not detect corrupted backup files during verification (834160)
The information in this article applies to:
- Microsoft Windows Small Business Server 2003, Premium Edition
- Microsoft Windows Small Business Server 2003, Standard Edition
- Microsoft Windows Server 2003, 64-Bit Datacenter Edition
- Microsoft Windows Server 2003, 64-Bit Enterprise Edition
- Microsoft Windows Server 2003, Datacenter Edition
- Microsoft Windows Server 2003, Enterprise Edition
- Microsoft Windows Server 2003, Standard Edition
- Microsoft Windows Server 2003, Web Edition
- Microsoft Windows XP Professional
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Datacenter Server
- Microsoft Windows 2000 Professional
- Microsoft Windows 2000 Server
SYMPTOMSWhen you use NTBackup to create a backup of your Windows 2000-based computer or server, NTBackup may not detect some forms of corruption or damage in the backup files during the verification pass.CAUSEThis behavior occurs because the verification pass uses a checksum comparison to determine if there is corruption in the backup files. The checksum algorithm uses a word-wise exclusive OR operation (XOR) comparison of the backup data. If corruption occurs in the data at the same location in a word an even number of times, the checksum algorithm cannot detect this corruption.
NTBackup uses the word-wise XOR algorithm for compatibility with the Microsoft Tape Format (MTF) specification. Section 5.1 of the MTF specifies the use of this algorithm.STATUS
This behavior is by design.
| Modification Type: | Major | Last Reviewed: | 3/26/2004 |
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| Keywords: | kbBackup kbnofix kbBug KB834160 kbAudITPRO kbAudEndUser |
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