In Veritas NetBackup, the "Target Retention" type is specifically designed for the SLP Import operation. This setting instructs the imported backup image to inherit the retention period from the final destination copy defined within the Storage Lifecycle Policy. In the given scenario, the final copy is on an off-site tape library with a required three-year retention. By selecting "Target Retention" for the import operation, the administrator ensures that the imported image and its subsequent copies will follow the entire lifecycle, culminating in the final tape copy being retained for the specified three years.

A. Expire after copy: This retention type is used for intermediate storage copies that are meant to be deleted as soon as the next copy in the SLP is successfully created.

B. Fixed: This option applies a specific, unchanging retention period to the imported copy itself, but it does not link its lifecycle to the retention of the final target copy.

C. Capacity Managed: This retention type is used for disk-based storage to automatically manage space by expiring the oldest images when capacity usage reaches a predefined high-water mark; it is not applicable for tape.

1. Veritas NetBackup™ 10.0 Administrator's Guide

Volume I.

Reference: Chapter 6

"Managing storage lifecycle policies

" Section: "Storage operation properties."

Details: The guide details the properties for SLP operations. For the "Import" operation

it defines "Target retention" as the type that applies the retention period of the destination storage unit (the final copy in the SLP) to the backup image being imported. This directly supports the selection of Target Retention to meet the three-year tape retention requirement.