Ensure your P420i controller is updated to a relatively recent firmware version to ensure compatibility with modern licensing keys. How to Get an HP Smart Array P420i License Key
ssacli ctrl slot=0 set hbamode=on
This article will explain you need to know about the P420i license key: what it is, why HP requires it, where to find one, the legal landscape surrounding it, and—most importantly—how to unlock your controller’s full potential without wasting money or breaking the law.
This feature optimizes solid-state drive (SSD) read performance. By bypassing the standard controller firmware execution path for high-performance SSDs, SmartPath routes I/O requests directly to the drives, drastically reducing latency and increasing IOPS. 3. HP Secure Encryption
Without a license, your powerful server is crippled to simple mirroring or striping. You cannot run a standard RAID 5 array, which is the backbone of most legacy storage configurations.
After applying a license key and migrating an array to RAID 6, the configuration is written to the drive metadata. If you replace the system board, you will need to re-enter the license key to recognize the RAID 6 array flawlessly.