PROBLEM on Backup > Schedule Volumes page, an agent is configured to back up a disk recent backup images created by the agent do not contain one or more of the partitions that the Kaseya shows as belonging to the selected disk (for example, the E partition shown above) backup logs may show a sudden, unexpected change to the size of the images CAUSE physical disk data shown on Schedule Volumes page is collected when Backup client installation is verified (which usually only runs after installation or upgrade) if physical disk layout has changed since the last time installation was verified, the data may no longer be correct if a partition is no longer on the selected disk, it will not be backed up SOLUTION to ensure the data is correct, go to Backup > Install/Remove page and run "verify installation" - this will update the information on Schedule Volumes page if any changes have been made since last "verify" if hardware changes are made frequently (as occurs in some VM environments, for example), selecting partitions for backup (instead of disks) will ensure that a specific partition is always selected for backup. APPLIES TO Kaseya VSA (Backup module) - all versions