XADM: "Portions of '\Log Files' Cannot Be Read" Error Message Is Logged to the Backup.log File When You Perform an Incremental Backup

When you use the Backup utility in Microsoft Windows Server 2003 or in Microsoft Windows 2000 Server to back up the Exchange 2000 information store, the following error message is logged to the Backup.log file: As a result, the incremental backup operation does not complete successfully.

This problem may occur if you back up the information store by using the following steps in the order that they are presented:

1. Perform a normal (full) backup.
2. Perform an incremental backup.
3. Perform an incremental backup.
4. Perform an incremental backup.
5. Perform a copy backup.
6. Perform an incremental backup.

In this situation, the Extensible Storage Engine (ESE) component does not correctly process the incremental backup operation in step 6, and you experience the symptoms that the "Symptoms" section of this article describes.

Cumulative Rollup Information

To resolve this problem, obtain the September 2003 Exchange 2000 Server Post-Service Pack 3 (SP3) Rollup. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

Hotfix Information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
Component: ESE

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. Note Because of file dependencies, this update requires Exchange 2000 Server Service Pack 3 (SP3). For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

To work around this problem, do not perform the copy backup operation.

Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.