Transaction log files for the Veeam ONE database grow too large or take up all available space on disk.
If you use the Full or Bulk-Logged recovery model for the Veeam ONE database, and collect a large amount of data from the virtual environment and backup infrastructure, database transaction log files can quickly grow in size.
Starting with version 9.5, Veeam ONE forcibly sets the recovery model to Simple when the database is created during installation. This type of recovery model prevents uncontrolled growth of database files.
However, for some configurations, such as SQL Server Always-On Availability Groups, the recovery model cannot be set to Simple. To reduce the amount of collected and stored data, you may consider changing Veeam ONE data collection mode. For details, see KB2179.