luks encrypt both drive, raid 1 btrfs the lvm?
but you need to decrypt both drive then. i think exist some script to decrypt two drive with same key but cant find.
edit: btrfs raid superior because bitrot detection + healing, most normal raid can detect but not heal.
𝕯𝖎𝖊𝖘𝖊 𝕶𝖔𝖒𝖒𝖊𝖓𝖙𝖆𝖗𝖘𝖊𝖐𝖙𝖎𝖔𝖓 𝖎𝖘𝖙 𝖓𝖚𝖓 𝕰𝖎𝖌𝖊𝖓𝖙𝖚𝖒 𝖉𝖊𝖗 𝕭𝖚𝖓𝖉𝖊𝖘𝖗𝖊𝖕𝖚𝖇𝖑𝖎𝖐 𝕯𝖊𝖚𝖙𝖘𝖈𝖍𝖑𝖆𝖓𝖉