Unlock the key, unlock the speed.
Newer hardware often includes the license by default. The HPE SR SmartCache license is on: HPE Smart Array P816i-a SR Gen10 . All Gen10 Plus or later controller models. Hpe Smart Cache License Key
Ensure you purchase the correct license tier. Some licenses are sold based on the controller model (e.g., licensing for the P-Series controllers). Unlock the key, unlock the speed