DOCUMENT:Q243601  12-NOV-2000  [exchange]
TITLE   :XADM: Backups Time Out on Large DBs when DB Scrubbing Is Enabled
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.5 SP2
OPER/SYS:
KEYWORDS:exc55sp2 kbExchange550preSP4fix kbExchange550sp4Fix

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The information in this article applies to:

 - Microsoft Exchange Server, version 5.5 SP2 
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SYMPTOMS
========

When you perform online backups of large information stores with the Database
Scrubbing option enabled during backup, the backup process may time out.

CAUSE
=====

Scrubbing the database during backup requires the metadata to be preread. On
large databases, it may take longer than the default value of two minutes to
preread the metadata. This causes the backup process to time out prematurely.

RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Exchange Server 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


STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5 SP2. This problem was first corrected in Exchange Server 5.5 Service
Pack 4.

MORE INFORMATION
================

For additional information on the Database Scrubbing option introduced in
Microsoft Exchange Server 5.5 Service Pack 2, click the article number below to
view the article in the Microsoft Knowledge Base:

   Q223161 XADM: Information on ESE Zeroing

Additional query words:

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Keywords          : exc55sp2 kbExchange550preSP4fix kbExchange550sp4Fix 
Technology        : kbExchangeSearch kbZNotKeyword2 kbExchange550SP2
Version           : winnt:5.5 SP2
Issue type        : kbbug
Solution Type     : kbfix

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