Out of the box, without a license key, the P420i operates in a mode. For many standard deployments, this is sufficient. However, for enterprise resilience and performance, the limitations are glaring.
You do not need a license to download or update HP SSA and the controller firmware. These are available for free from the HPE Support Center. Navigate to the support page for your specific server model (e.g., HP ProLiant DL380p Gen8) and download the latest software.
Open your command terminal or PowerShell and run the following command:
The key is a string typically formatted as XXXXX-XXXXX-XXXXX-XXXXX-XXXXX . It is tied to the specific feature set (SAAP) rather than the serial number of the server. hp smart array p420i license key
Note: Some later firmware versions (v4.68+) may unlock RAID 6/60 without a separate key if you have a Flash Backed Write Cache (FBWC) module installed.
In the Available Tasks panel, click Manage License Keys .
Without the license, the P420i can only process parity for single-drive failure tolerance (RAID 5). The license enables the RAID 6 algorithms, which compute dual parity. This allows the array to survive the simultaneous failure of two physical drives—a critical requirement for large-capacity arrays where rebuild times are lengthy, and the probability of a second drive failure during reconstruction is statistically significant. Out of the box, without a license key,
Uses high-speed SSDs as a caching tier for slower HDD arrays, drastically reducing latency.
Supports RAID 1 ADM (Advanced Data Mirroring). The Shift to "Entitlement" (Important Update)
Are you encountering a during activation? Do you need assistance configuring RAID 6 after activation? Share public link You do not need a license to download
(Replace XXXXX-XXXXX-XXXXX-XXXXX-XXXXX with your actual license key).
and are building a system today: Do not buy one. The cost of a license (often $100+) significantly exceeds the cost of replacing the controller ($30 for a P420 standalone card, which also requires a license... or $50 for a used P440 which does not). Use the money to upgrade your hardware to Gen9 or switch to a software-defined storage model.