%1 (%2) %3The streaming page read from the file “%4” at offset %5 for %6 bytes failed verification due to a page checksum mismatch. The expected checksum was %8 and the actual checksum was %9. The read operation will fail with error %7. If this condition persists then please restore the database from a previous backup.

This Warning event indicates that the streaming database specified in the message is corrupted. The event description provides details about the error that occurred.

The following provides information about the most common error associated with this event:

Error -613 = 0xfffffd9b = Jet_errSLVReadVerifyFailure = Checksum error in SLV file during backup. Error -613 resembles error -1018. Exchange logs error -613 for checksum errors on the .stm database file and logs error -1018 for checksum errors on the .edb database file. Checksums for pages in the .stm file are stored in a table in the .edb file. The .edb and .stm files may be out of sync. An older copy of the .stm file may be in use, and the checksum table in the .edb file is therefore out of date. A program may have altered the .stm file without updating the checksums in the .edb file. There could be problems with the hard disk subsystem or controllers of the system.

To resolve this warning, do the following:

• Determine the root cause of the corruption. To do this, check the System log, run Chkdsk and perform other diagnostic tasks. If you do not determine and fix the root cause of this warning, the corruption problem may occur again, even if you repair the databases or restore the databases from a backup.

• Temporarily disable or remove the antivirus software or third-party software. This may help identify the root cause of this event.

• Restore the Exchange store from the previous online backup.

• Move the mailboxes to another server or mailbox store. If the public folder store is affected, replicate the content of the public folders to another server.

• If there is no valid online backup and as a last resort, perform a repair using Eseutil /p and then run the isinteg -fix. If the resolution requires a repair, you cannot repair the .stm file alone. You must repair the .edb file and its associated .stm file. After this procedure, the database may not be stable and reliable. You should immediately move the data out of the repaired database to a new database or rebuild the database.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.