Database error occurred while accessing the database


Topic Last Modified: 2007-11-16

The Microsoft Exchange Server 2007 Management Pack for Microsoft Operations Manager (MOM) monitors the Windows Application log on computers that are running Exchange Server 2007 and generates this alert when the event or events specified in the following Details table are logged.

To learn more about this event, do one or more of the following:

  • Review the description of the event that includes the variables specific to your environment. From the MOM Operator Console, select this alert, and then click the Properties tab.

  • Review all events that have been logged that meet the criteria of this MOM alert. From the MOM Operator Console, click the Events tab, and then double-click the event in the list for which you want to review the event description.


Product Name


Product Version

8.0 (Exchange Server 2007)

Event ID


Event Source


Alert Type


MOM Rule Path

Microsoft Exchange Server/Exchange 2007/Mailbox/Information Store

MOM Rule Name

Database error occurred while accessing the database. This could be an I/O or disk error.


This Error event indicates that the threshold of uncommitted transaction log files in the Exchange database has been reached or about to be reached. This error may cause all databases under the storage group specified in the event description to dismount automatically. In Microsoft® Exchange Server 2007, transaction log file size has been reduced to 1 MB compared to 5 MB in Exchange 2000 Server or Exchange Server 2003. For more information about the changes in database functionality for Exchange Server 2007, see New Exchange Database Functionality on the Exchange Server TechCenter.

Another symptom you may experience is that MSExchangeIS Warning event 9788 is logged in the Application log. For more information about the event, visit the Events and Errors Message Center.

User Action

To resolve this error, see Microsoft Knowledge Base Article, 925817 The information store is dismounted, and an event ID 1159 message is logged in Exchange Server 2007 on Microsoft Help and Support center.

For More Information

To search the Microsoft Knowledge Base articles based on criteria that generated this alert, visit the Search the Support Knowledge Base (KB) Web site.

To review Exchange 2007 event message articles that may not be represented by Exchange 2007 MOM alerts, see the Events and Errors Message Center.

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.