How to manage devices that cannot be scanned?

We are currently implementing a first installation of ServiceDesk build 8127. We have many devices, mainly linux based thin clients, that we are not able to scan. In our environment these devices are basically consumable items in that anyone can replace them with new hardware if needed. We would like to have the devices inventoried into ServiceDesk as assets but modifying every device to enable SSH so that they can be scanned is currently not an option.

Currently all of these devices show up in the list: Workstation(s)/Server(s) failed during last scan.

Is there a way that I can manually add these devices to SD without scanning them? Is there a way that I can keep them from populating the failed scan list so that it only contains actionable items?

Thanks!

Scott