Microsoft KB Archive/828092

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

Article ID: 828092

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition
 * Microsoft Exchange 2000 Enterprise Server

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SYMPTOMS
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:

Backup Type: Incremental

Backup started on  at.

WARNING: Portions of &quot;\Log Files&quot; cannot be read. The backed up data is corrupt or incomplete.

This file will not restore correctly.

Backup completed on  at.

As a result, the incremental backup operation does not complete successfully.



CAUSE
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 &quot;Symptoms&quot; 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:

824282 September 2003 Exchange 2000 Server Post-Service Pack 3 Rollup

Hotfix Information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Exchange 2000 Server service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

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.

Date        Time   Version        Size    File name - 15-Sep-2003 19:44  6.0.6508.0  2,183,168  Ese.dll 15-Sep-2003 19:44  6.0.6508.0     40,960  Eseperf.dll 09-Sep-2003 01:18                  6,991  Eseperf.hxx 15-Sep-2003 19:44                391,634  Eseperf.ini

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:

301378 How to Obtain the Latest Exchange 2000 Server Service Pack



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



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

Additional query words: kbExchange2000preSP4septbarFix

Keywords: kbhotfixserver kbqfe kbqfe kbfix kbexchange2000presp4fix kbbug KB828092

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