The Backup server zones feature can be used to create different tiers of service – for example, by organizing backup servers in the cloud into different backup server zones. You can also specify limits and prices individually for each Backup Server Zone assigned to the Bucket. For general information on how backups work, where they are stored, the types of backups, refer to Virtual Server Backups section of this guide.
Backup server zones have types which are inherited by the backup servers in the zone. Later backup servers can be attached to a compute resource/compute zone of the same type. Backup servers can be moved from one backup server zone to another, but the zones should be of the same type. For more information refer to Zone Types. Backups server zones can have either the Virtual or the Smart type.