1806: Backup of Volumes Over 4 TB Fails in Linux

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Last update: 28-05-2010

Acronis True Image errors out with "Unable to create volume snapshot" when backing up volumes of over 4 TB in size in Linux

This article applies to:


  1. Using Acronis True Image you are trying to back up a volume of over 4 TB in size;
  2. Acronis True Image fails to back up with an error message similar to the following one:

Unable to create volume snapshot


In Linux, Acronis True Image cannot allocate more than 128 KB of continuous memory to create a snapshot. Thus, maximum size of a partition of which a snapshot can be created is 4 TB.


To back up a partition of over 4 TB in size, you will need to bypass the snapshot creation. There are two ways to do this:

More information

(!) This limitation applies to the size of the volume, not to the size of data on the volume.

(!) Acronis True Image does not have the same limitation in Windows.

For detailed information on what a snapshot is, please see SnapAPI.