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.  If there are slices that need to be saved from original archive, you should export them first to new archive with split size and then delete the source archive. Then you can continue backing up to new archive.

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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