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The requested operation could not be completed due to a file system limitation

KB ID: 1893
Product: Veeam Backup & Replication | 9.5 | 10 | 11 | 12 | 12.1 | 12.2
Published: 2014-06-04
Last Modified: 2021-09-20
Languages: DE
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Challenge

Transform operations of a large file located on a Windows Server 2012/2012 R2 deduplicated volume fail with the error:
 Error: Client error The requested operation could not be completed due to a file system limitation Failed to flush file buffers. File: Filename.vbk

Cause

Veeam is not able to write any data to the affected file because of an NTFS limitation. 

Manual un-deduplication (Expand-DedupFile) of this file also fails with the same error.

Solution

The backup repository must be located on a volume formatted with the large FRS using the command:
Format <Drive:> /FS:NTFS /L

Workaround

  1. Disable Windows deduplication
  2. Un-dedupe backup files:
    1. copy backup files to a temporary folder
    2. delete original backup files
    3. move copied files back to the original location.
  3. Disable NTFS compression on backup repository volume.

More Information

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