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Q237953: XADM: Erroneous -1018 Error Returned During Online Backup

Article: Q237953
Product(s): Microsoft Exchange
Version(s): winnt:5.5
Operating System(s): 
Keyword(s): exc55 EXC55SP3Fix
Last Modified: 11-JUN-2002

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The information in this article applies to:

- Microsoft Exchange Server, version 5.5 
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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

  Q256986 Description of the Microsoft Windows Registry

SYMPTOMS
========

When you perform an online backup of the Exchange Server directory or
information store on a single-processor computer, a -1018 error
(JET_errReadVerifyFailure) may be returned even though the corresponding
database is not actually damaged. Note that this problem only occurs if you are
running version 5.5.2608.0 of the Ese.dll file.

CAUSE
=====

This problem occurs when the buffer for the Windows NT Backup program is set to
a value greater than 512 KB.

RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Exchange Server
version 5.5. For additional information, please see the following article in the
Microsoft Knowledge Base:

  Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or
later:

Component: Exchange Database Engine

+------------------------+
| File name | Version    | 
+------------------------+
| Ese.dll   | 5.5.2635.0 | 
+------------------------+


WORKAROUND
==========

Set the buffer to 512 KB or less. To do so, use the following steps.

WARNING: If you use Registry Editor incorrectly, you may cause serious problems
that may require you to reinstall your operating system. Microsoft cannot
guarantee that you can solve problems that result from using Registry Editor
incorrectly. Use Registry Editor at your own risk.

1. Start Registry Editor (Regedt32.exe).

2. Locate the Max Buffer Size value under the following key in the registry:

  HKEY_CURRENT_USER\Software\Microsoft\NTBackup\Backup Engine

3. On the Edit menu, click DWORD, type a value no greater than 512, and then
  click OK.

4. Quit Registry Editor.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5. This problem was first corrected in Exchange Server 5.5 Service
Pack 3.


Additional query words:

======================================================================
Keywords          : exc55 EXC55SP3Fix 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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