Simple definition
A scale-out backup repository combines multiple storage extents into a logical repository with placement and tiering policies.
Purpose and use
A SOBR, Scale-Out Backup Repository, groups multiple Veeam backup locations under common logical management.
How does it work?
Extents and storage tiers receive data according to supported placement, capacity and retention policies.
Example and verification
Before adding an extent, verify access, usable capacity and the impact of its failure on restore points stored there.
Points to watch
Grouping is not automatically RAID or replication of every file across all extents. Understand where data and its dependencies reside.
In short
A SOBR simplifies management and expansion while still requiring explicit component protection and recovery planning.