Manage Recovery Points: Understanding Backup Sizes



This article explains potential discrepancies between data reported within the Manage Recovery Points page and the actual data written per snapshot. 


  • Datto SIRIS
  • Datto ALTO
  • Datto NAS


Figure 1: Backup Sizes

The reported snapshot size found in the Manage Recovery Points page is not the amount of data written to disk. Rather, it is reporting on data unique to that point, and not housed in any other snapshots. This is a useful metric in measuring reclaimed free space if you were to delete only that point.

The most recent snapshot may display a smaller size due to how it incorporates data with the live dataset on the appliance. This is a duplicate of the most recent snapshot. The size will fluctuate and update with newer snapshots, and as data becomes unique to certain snapshots, or shared between them.

Datto Technical Support can provide command line output of snapshot data written to disk upon request.

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