If you need a real, legally obtained license key, here are your options.
Real-world friction
When working with HP Smart Array P420i and license keys:
One license per physical server, non-transferable.
These "Advanced Data Guarding" (ADG) levels provide higher fault tolerance by allowing for two simultaneous drive failures.
HP Smart Array Advanced Pack Evaluation License Key · GitHub
To verify:
A: No. Installing or removing a license does not touch your existing logical drives or data. It only changes available features upon reboot.
Look for a line like:
RAID 10 (1+0) does require a license. You give up some capacity (50% of raw storage) but gain excellent performance and faster rebuilds than RAID 5 or 6.