Why is System Volume Information not accessible? In addition, SVI stores metadata and information used by Windows Backup, System Image Backup, Volume Shadow Copy service, and Windows Search indexing. It’s also used by Windows Information Protection (WIP), formerly known as enterprise data protection (EDP), to store the encryption keys. However, it’s not only used by the System Restore feature. System Volume Information (SVI) is the datastore folder used by the System Restore feature.