63516: Acronis True Image 2020: Incremental backups do not create separate files when using new backup format

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Introduction

Acronis True Image 2020 introduced a new backup format - .tibx, which is even more reliable and convenient. The .tibx format is used for disk backups created to internal drives, external drives, network storage. 

One of the main changes in this new backup format is that the .tibx format saves full and differential backup versions as separate files, while incremental backup versions are automatically merged into their base backups (full or differential).

Description

A local .tibx file can contain:

  • one full backup
  • one full backup and one or more incremental backups
  • one differential backup
  • one differential backup and one or more incremental backups

A local .tibx file cannot contain:

  • just incremental backups, without a full or differential backup

If the you selected Incremental backup method under Options - Backup scheme, then all incremental backups until the next full or differential backup will be written to the same file. If you used earlier versions of Acronis True Image, you may expect a separate .tib file to be produced on each run of the backup - writing all incremental backups to the same file is one of the changes from the .tib format. It is not possible to force the old behavior to put incremental backups in separate .tibx files.

For example, if you run the backup 7 times, using the default setting Create a full version after every 5 incremental versions and backup name System Partition, it will produce:

  • 1 full backup, stored in "System partition.tibx"
  • 5 incremental backups, stored all in the same file "System partition.tibx"
  • 1 new full backup, stored in "System partition-0001.tibx"
If you have several .tibx files belonging to the same backup, be aware that Date modified parameter of the existing backup file may change when the new backup is run. This is expected behavior, due to the way metadata is written to backups in new backup format.

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