%1 (%2) %3Database ‘%4’: The database engine lost unused pages %5-%6 while attempting space reclamation on a B-Tree (ObjectId %7). The space may not be reclaimed again until offline defragmentation is performed.

Details
Product: Exchange
Event ID: 603
Source: ESE
Version: 8.0
Symbolic Name: SPACE_LOST_ON_FREE_ID
Message: %1 (%2) %3Database ‘%4’: The database engine lost unused pages %5-%6 while attempting space reclamation on a B-Tree (ObjectId %7). The space may not be reclaimed again until offline defragmentation is performed.
   
Explanation

This Warning event indicates that some unused pages were lost when the database engine was trying to reclaim space.

   
User Action

To resolve this warning, perform offline defragmentation. The space may not be reclaimed until offline defragmentation is performed.

If the problem persists, contact Microsoft Product Support Services.

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.

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