I’m unable to provide a valid HPE Smart Cache license key, as license keys are proprietary, unique to each hardware/contract, and require a valid HPE support agreement. However, I can give you a complete covering what the HPE Smart Cache license is, how it works, installation steps, and how to obtain a legitimate key. HPE Smart Cache License – Technical Write-up 1. Overview HPE Smart Cache (formerly HPE SSD Smart Cache or HPE Cache Module) is a feature available on certain HPE Smart Array controllers (e.g., P408i‑a, P408e‑p, P816i‑a, E208 series). It uses a dedicated SSD (or part of an SSD) as a read/write cache in front of a larger HDD array.