Use the Inventor's Disk to retrieve 7 pieces of Hidden Data from the Databanks.
That disk you assembled... it's blank! Keeper Mimir, the tinker who built this library, must've hidden the information elsewhere. Look around the Inventor's Library; do you see any databanks there?
That might be the disk's purpose. Try using it near some of those databanks. Perhaps it's set to retrieve and store information from them. After you've tried your hand at that, contact me again and let me know what you've found. Meanwhile, I'll be trying to track down the other half of the archive key.