61704: Acronis Backup: Backup fails with "Windows error: (0x80070299) The requested operation could not be completed due to a file system limitation" or "Cannot write data to file <path> due to a file system limitation"

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Symptoms

 

  1. You create a backup to a destination formatted in NTFS 
  2. Backup fails with one of the following errors:

Windows error: (0x80070299) The requested operation could not be completed due to a file system limitation

or

Cannot write data to file <path> due to a file system limitation. The disk may be highly fragmented or the file is too large
 

Cause

There are two possible causes:

  1. Disk is highly fragmented, so that when data is written to the archive, it hits file system limitation 
  2. Archive format uses sparse files - fragmented files that contain holes, which do not occupy physical disk space. In combination with native file system fragmentation, large backup file that contains a lot of sparse files, hits file system limitation and backup fails with the error.

Solution

  1.  In Backup Options -> Splitting enable fixed size split backup and set slice size between 100GB and 500GB, and create a new backup archive.

    (!) Splitting option is not available for Always incremental backup scheme. See https://www.acronis.com/en-us/support/documentation/AcronisBackup_12.5/#39658.html for details

  2.  Free up additional space on the disk or add storage capacity

More information

In case you are specially preparing a storage with NTFS file system for storing large backups, for better handling of large files it is recommended to set a 64 KB NTFS allocation unit size and enable support for large file record segments (FRS) on the partition: see Formatting requirements for large files in this document for more information.

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