| Details | |
| Product: | Exchange |
| Event ID: | 447 |
| Source: | ESE |
| Version: | 6.5.6940.0 |
| Component: | Microsoft Exchange Extensible Storage Engine |
| Message: | <process name> (<process id>) <storage group name>A bad page link (error <error code>) has been detected in a B-Tree (ObjectId: <id>, PgnoRoot: <number>) of database <name> (<number> => <number>, <number>). |
| Explanation | |
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A corrupted page link was detected in a B-Tree. Available space in the Exchange store database is in the form of a list of pages that can be used to store new data. The available space is called a space tree. The space tree is held as a binary tree that is searched whenever a block of new data needs to be added to the database. During an online defragmentation, a problem was discovered in this tree. This is often caused by a hardware failure or antivirus scanning of the database file directory. |
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| User Action | |
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If you receive these errors in your application log, it is suggested that you restore from an online backup as soon as you can. A bad page link error signifies logical corruption at the Jet level in the database, and it is not safe to continue using the database. Note: The restore must be performed using a backup before this error occurred. In a worst case scenario, a hard repair followed by an isinteg -fix and then an ExMerge of the database may be required if no good backup exists. If you need help with a hard repair followed by an isinteg -fix and then an ExMerge or if the problem persists, contact Microsoft Product Support Services. |
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