XADM: Backup Checksuming Not Performed on Single Processor Computers

ID: Q230215

The information in this article applies to:

Microsoft Exchange Server, version 5.5 SP2

SYMPTOMS

When you attempt to perform an online backup of the Microsoft Exchange directory and information store services on a single processor server, you do not receive any error messages indicating the database failed checksum verification during backup, and the backup process indicates it completed successfully.

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: JET

FileName	Version
Ese.dll	5.5.2608.0

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5 Service Pack 2. This problem was first corrected in Exchange Server 5.5 Service Pack 3.

MORE INFORMATION

During the backup process, JET, the underlying database engine for Microsoft Exchange Server, performs a checksum verification of each page read from the database to ensure the health of the database being backed up. This issue indicates that it is possible on single processor computers for Windows NT Backup or other third-party backup utilities to inadvertently back up a corrupted database without warning or errors.

For additional information on the checksum process, please see the following article in the Microsoft Knowledge Base:

Q151789 XADM: Error -1018 (JET_errReadVerifyFailure)

For additional information on the backup process, please see the following articles in the Microsoft Knowledge Base:

Q179308 XADM: How To Verify Exchange Online Backups

Q182903 XADM: ESEUTIL Command Line Parameters

Additional query words:

Keywords : exc55sp2 EXC55SP3Fix
Version : winnt:5.5 SP2
Platform : winnt
Issue type : kbbug