Exchange database files are being written to a non-NTFS partition

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at]  

Topic Last Modified: 2010-07-26

The Microsoft® Exchange Best Practices Analyzer Tool queries the Win32_Directory Microsoft Windows® Management Instrumentation (WMI) class to determine the value of the FSName key for the Exchange database file path. If the Exchange Server Analyzer determines that the value for the FSName key does not equal NTFS File System, an error is displayed.

Microsoft does not support the storage of Exchange data files on non-NTFS volumes. The Exchange data files include all the following files:

  • .edb files

  • .stm files

  • .log files

  • .dat files

  • .chk files

  • .eml files

If you see this error, you must move the database files to a folder on an NTFS drive. Alternatively, if the drive on which the database files are stored is formatted as a FAT drive, you can use the convert.exe command-line tool to convert the drive to NTFS.

  1. Open Exchange System Manager.

  2. Expand Administrative Groups, expand your administrative group, expand Servers, expand your server, expand your storage group, right-click Mailbox Store, and then click Properties.

  3. On the Database tab, under Exchange database, or Exchange streaming database, click Browse, type the path location to a folder on an NTFS volume, and then click OK.

  4. Click OK or Apply to apply your changes, or click Cancel if you do not want to apply your changes.

  5. If you clicked OK or Apply, you receive the following warning message:

    Note   You are about to perform the following operation(s)

    • change the Exchange database location

    • change the Exchange streaming database location

    To perform the requested operation(s), the store must be dismounted which will make it inaccessible to any users.

    Do you want to continue?

    Only the operations that you have chosen are listed in the warning message. The warning message contains a Yes and a No button.
  6. Click Yes if you are ready to proceed, otherwise click No.

  7. If you clicked Yes, the stores (databases) are dismounted, moved, and remounted. When these procedures are successfully completed, you receive the following informational message:

    The database files have been moved successfully

  1. Follow the guidance in the core Exchange Server 2007 documentation, "How to Move a Storage Group Path" ( )

If the drive on which the files are stored is formatted as a FAT drive, you can also use the convert.exe command-line tool to convert the drive to NTFS. For information about how to use the convert.exe command-line tool to convert a FAT partition to an NTFS partition, see Microsoft Knowledge Base article 214579, How to Use Convert.exe to Convert a Partition to the NTFS File System.


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