DOCUMENT:Q197500  23-OCT-2000  [exchange]
TITLE   :XADM: Tape Backup Program Hangs During Exchange Backup
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.5
OPER/SYS:
KEYWORDS:exc55 EXC55SP3Fix

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The information in this article applies to:

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

A backup program stops responding (hangs) while you are attempting to back up an
Exchange Server database.

CAUSE
=====

Backup programs that attempt to use large buffers to read data from an Exchange
Server computer are susceptible to this problem. When an attempt is made to back
up a server using a large buffer, the backup program initiates the read attempt
and waits for data to be read into the buffer. Because the buffer is large, a
problem allocating memory for this buffer may result on the server, causing the
read on the server to fail. Because no data will be returned to the backup
program, the backup program will wait indefinitely.

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    | 
+--------------------------+
| Edbbcli.dll | 5.5.2511.0 | 
+--------------------------+

This hotfix has been posted to the following Internet location as Psp2esea.zip
and Psp2esei.zip:

   ftp://ftp.microsoft.com/bussys/exchange/exchange-public/fixes/Eng/Exchg5.5/PostSP2/ese-fix/


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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