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File operations with large restore points located on an NTFS volume that uses Windows Data Deduplication fail with errors similar to the following: The requested operation could not be completed due to a file system limitation. Failed to flush file buffers. File: Filename.vbk
This error is relayed by Veeam Backup & Replication from the error reported to it by the underlying OS's filesystem. When this occurs, Veeam cannot write any data to the affected file because of an NTFS limitation. Manual rehydration of the file, using the command Expand-DedupFile, will likely also fail with the same error.
Verify FileRecord Segment Size Connect to the Windows machine hosting the NTFS volume used as the Windows Repository. Open an Administrative Terminal (CMD or PowerShell) and execute the following command for the drive:Note: Replace V: with the appropriate drive letter.
For Windows Server 2008(R2) please refer to Microsoft KB for a detailed description of the issue:http://support.microsoft.com/kb/967351 For information about best practices for Microsoft Data Deduplication, review Veeam KB2023: Best Practices for Microsoft Data Deduplication.
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