HPE StoreOnce Catalyst is the supported native integration route for Veeam Backup & Replication when a customer wants efficient backup transport and source-side deduplication. A Veeam gateway server uses the Catalyst interface to communicate with the StoreOnce appliance. With a suitable Low Bandwidth policy, the source-side Catalyst library identifies block fingerprints so data already present on the appliance need not be sent again. This reduces traffic over constrained backup networks. The HPE StoreOnce Catalyst OST Plug-in belongs to the Veritas NetBackup or Backup Exec integration family, not the native Veeam integration requested. Cloud Bank extends data protection to supported object-storage destinations, while StoreOnce VTL exposes tape-library emulation. Implementation requires creation of a Catalyst store, appropriate permissions, repository configuration, license entitlement, network or Fibre Channel paths, and supported firmware. The original uploaded key chose the OST plug-in, but the product-specific documentation supports the general Catalyst interface in option B. Architects must distinguish a transport API from a backup-vendor-specific integration component.

Study Guide Reference: Native Veeam StoreOnce Catalyst integration, low-bandwidth policy and OST distinction.

Official reference(s): StoreOnce QuickSpecs